DEAS/ 1112: 2022  
ICS 61.060  
 
© EA C 2022                                                                                                                           Edition 2022   
 
 DRAFT EAST AFRICAN STANDARD  
Bathroom slippers -Specification  
 
EAST AFRICAN COMMUNITY  
 
                                                                                                                                         
DEAS/ 1112: 2022  
ii © EAC 2022  – All rights reserved  
 Copyright notice  
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© EAC 2022  – All rights reserved  iii 
 Contents  Page 
Foreword ................................ ................................ ................................ ................................ ......................  v 
1 Scope ................................ ................................ ................................ ................................ ..............  1 
2 Normative references  ................................ ................................ ................................ .....................  1 
3 Terms and definitions  ................................ ................................ ................................ .....................  1 
4 Requirements  ................................ ................................ ................................ ................................ . 2 
4.1 General Re quirements  ................................ ................................ ................................ ..........................  2 
4.2 Specific Requirements ................................ ................................ ................................ ...........................  2 
5 Marking  ................................ ................................ ................................ ................................ .....................  3 
6 Packing  ................................ ................................ ................................ ................................ ...........  3 
7 Sampling  ................................ ................................ ................................ ................................ ...................  4 
Annex A (normative)  Children’s range  ................................ ................................ ................................ ....... 5 
Annex B (normative)  Determination of compression set at constant stress  ................................ ..............  6 
B.1 Apparatus  ................................ ................................ ................................ ................................ ....... 6 
B.2 Test piece  ................................ ................................ ................................ ................................ ....... 6 
B.3 Procedure  ................................ ................................ ................................ ................................ ....... 6 
B.4 Expression of results  ................................ ................................ ................................ ......................  6 
Anne x C (normative)  Determination of room temperature shrinkage  ................................ ........................  7 
C.1 Test piece  ................................ ................................ ................................ ................................ ....... 7 
C.2 Conditioning of the test piece  ................................ ................................ ................................ .........  7 
C.3 Number of tests  ................................ ................................ ................................ ..............................  7 
C.4 Procedure  ................................ ................................ ................................ ................................ ....... 7 
C.5 Calculation  ................................ ................................ ................................ ................................ ...... 7 
Annex D (norma tive)  Determination of heat shrinkage  ................................ ................................ ..............  8 
D.1 Test pieces  ................................ ................................ ................................ ................................ ..... 8 
D.2 Conditioning of test piece  ................................ ................................ ................................ ...............  8 
D.3 Number of tests  ................................ ................................ ................................ ..............................  8 
D.4 Procedure  ................................ ................................ ................................ ................................ ....... 8 
D.5 Calculation  ................................ ................................ ................................ ................................ ...... 8 
Annex E (normative)  Determination of water absorption  ................................ ................................ ...........  9 
E.1 Test pieces  ................................ ................................ ................................ ................................ ..... 9 
E.2 Conditioning  ................................ ................................ ................................ ................................ .... 9 
E.3 Procedure  ................................ ................................ ................................ ................................ ....... 9 
E.4 Expression o f results  ................................ ................................ ................................ ......................  9 
Annex F (normative)  Determination of split tear  ................................ ................................ .......................  10 
F.1 Apparatus  ................................ ................................ ................................ ................................ ..... 10 
F.2 Conditioni ng ................................ ................................ ................................ ................................ .. 10 
F. 3 Test pieces  ................................ ................................ ................................ ................................ ... 10 
F.4 Procedure  ................................ ................................ ................................ ................................ ..... 10 
F.5 Results  ................................ ................................ ................................ ................................ ..........  10 
Annex G (normative)  Determination of strength required to pull strap from soling hole at the heel and 
toe end  ................................ ................................ ................................ ................................ ..........  12 
G.1 Apparatus  ................................ ................................ ................................ ................................ ..... 12 
G.2 Test piece preparation  ................................ ................................ ................................ ..................  12 
G.3 Procedure  ................................ ................................ ................................ ................................ ..... 12 
G.4 Expression of results  ................................ ................................ ................................ ....................  12 
Annex H (normative) Method of Sampling and criteria for acceptance  ................................ .....................  14 
H.1 Scale of sampling  ................................ ................................ ................................ ................................  14 
H.2 Method of selection  ................................ ................................ ................................ .............................  14 
H.3 Defects  ................................ ................................ ................................ ................................ ................  15                                                                                                                                         
DEAS/ 1112: 2022  
iv © EAC 2022  – All rights reserved  
 H.4 Acceptance criteria  ................................ ................................ ................................ .............................  15 
Bibliography  ................................ ................................ ................................ ................................ ..............  16 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  DEAS/ 1112: 2022  
© EAC 2022  – All rights reserved  v 
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and services are exchanged within 
the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and issue 
East African Standards  (EAS) . The Committee is composed of r epresentatives of the National Standards Bodies 
in Partner States, together with the representatives from the public and private sector organizations  in the 
community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodie s in the Partner 
States. The comments received are discussed and incorporated before finalization of standards, in accordance 
with the Principles and procedures for development of East African  Standards.  
East African Standards are subject to review, to kee p pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC/TC 06 4, Footwear.  
Attention is drawn to the possibility that some of the elements of this document may be subject of patent rights. 
EAC shall not be held responsible for identifying any or all such patent right s. 
 DEAS/ 1112: 2022   
 
© EAC 2022 – All rights reserved  
  
 Bathroom Slippers -Specification  
1 Scope  
This  Draft East African Standard specifies the requirements , sampling  and test methods for bathroom slippers  
with sole made of Ethylene Vinyl Acetate  (EVA) and  other  combinations of which EVA is the most dominant.  
2 Normative references   
The following referenced documents are referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
ISO 48 -2, Rubber, vulcan ized or thermoplastic — Determination of hardness — Part 2: Hardness between 10 
IRHD and 100 IRHD  
ISO 2420,  Leather — Physical and mechanical tests — Determination of apparent density and mass per unit 
area 
ISO 2589 , Leather — Physical and mechanical tests  — Determination of thickness  
 ISO 3376, Leather — Determination of tensile strength and elongation  
 ISO 3377 -1, Leather — Determination of tearing load  
ISO 16177,  Footwear — Resistance to crack initiation and growth — Belt flex method  
ISO 17706, Footwear — Test methods for uppers —Tensile strength and elongation  
ISO 20871,  Footwear — Test methods for outsoles — Abrasion resistance  
ISO 199 52, Bathroom slippers  — Vocabulary ,bathroom slippers  
ISO 13287 , Personal protective equipment — Footwear — Test method for slip resistance  
ISO 20344 , Personal protective equipment — Test methods for footwea r 
 
 
3 Terms and definitions  
For the purposes of this document, the terms and definition s given in ISO 19952 apply . 
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso.org/obp  
3.1 Bathroom slippers   
2 © EAC 2022  – All rights reserved  
 a type of bathroom slippers  that can be slipped on and off easil y made with straps and worn in the bathroom”  
 
4 Requirements  
4.1 General Requirements  
4.1.1  The material shall be polymer of  Ethylene Vinyl Acetate  (EVA) and combinations of which EVA is the 
most dominant.  
4.1.2  The sole surface shall be free from blisters, cavities, collapses or blemishes.  The die markings shall 
be neat and clean,  and the surface shall have good  finish.  
4.1.3  The length and the standard sizes designations  shall be as given in Annex A.  
4.1.4  The minimum s ole thickness shall be 12 mm  when tested in accordance with ISO 2 589 for all the sizes.  
4.1.5 The straps shall be trimmed smooth  
4.2 Specific Requirements  
 The physical requirements for sole and the strap material shall comply with the values given in Ta ble 1 and 
Table 2 respectively  when tested in accordance with the test methods specified therein  
Table 1 — Physical requirements for sole material  
S/N Characteristic  Requirement  Test method  
i.  Density g/cm3 0.2 – 0.5 ISO 2420  
ii.  Hardness (IRHD)  30 – 55 ISO 48 -2 
iii.  Tensile strength (MPa), min.  1.0 ISO 3376  
iv.  Elongation, %, min.  50 ISO 3376  
v.  Tear strength, N, min.  35 ISO 3377 -1 
vi.  Compression set at constant stress, %, max.  35 Annex B  
vii.  Flexing resistance:  
a) Flexing endurance (flexing cycles), min.  
 
b) Cut growth at the end of 35 000 cycles 
at 500 % (mm), max.   
35 000  
 
 
3 ISO 16177  
viii.  Abrasion loss (cubic mm), max.  1200  ISO 20871  
ix.  Room temperature shrinkage   (%), max.  1.0 Annex C  
x.  Heat shrinkage for 1 h at 100 °C, (%) max.  2.0 Annex D  
xi.  Water absorption, %, max.  5 Annex E  
xii.  Split tear strength (N), min.  35 Annex F   
© EAC 2022  – All rights reserved  3 
 xiii.  Slip resistance ( Coefficient of Friction  )  ISO 13287  
ISO 20 344 
 
 
 
Table 2 — Physical requirements for strap  
 
 
5 Marking  
Bathroom Slippers shall be indelibly and legibly marked with  the following information:  
a) size range;  
b) name or trademark of the manufacturer;  
6 Packing  
6.1 Each piece shall be packe d with its complementary piece.  
6.2 The pieces shall be of the same size and shape (design).  S/N 
Characteristic  Requirement  
Test method  Polyvinyl 
Chloride  
(PVC)  Rubber  
i.  Tensile strength (MPa), 
min. 5 15 ISO 3376  
ii.  Elongation, %, min.  150 250 ISO 3376  
iii.  Breaking strength (N), min.  
 
a) Stem  
 
b) Toe 
 
c) Heel  
 
180 
 
180 
 
180  
 
180 
 
180 
 
180  ISO 17706  
iv.  Pull strength (N), min.  
 
a) Toe end  
 
b) Heel end  
 
100 
 
100  
 
100 
 
100 Annex G  
NOTE In number iii), test pieces to be cut in lengthwise direction only.   
4 © EAC 2022  – All rights reserved  
 6.3  The pair shall be packed in a suitable material so as to protect the product from damage during 
transportation and storage  
6.4 Each package shall be marked with the following information:  
a) name of item;  
 
b) batch number;  
c) name or trademark of the manufacturer  
d) Physical address ; and  
e) country of origin.  
 
7 Sampling  
Sampling shall be done in accordance with annex H. 
 
 
  
© EAC 2022  – All rights reserved  5 
  Annex A  
(normative)  
 
Children ’s range  
Table A.1  — Children’s range  
Size 
designation  Minimum  length  
mm 
3 126 
4 135 
5 143 
6 152 
7 160 
8 169 
9 177 
10 186 
11 194 
12 203 
13 211 
 
Table A.2  — Adults’ range  
Size Minimum length  
mm 
1 220 
2 228  
3 237 
4 245 
5 254 
6 262 
7 271 
8 279 
9 288 
10 296 
11 305 
12 313 
13 322 
 
  
6 © EAC 2022  – All rights reserved  
  Annex B  
(normative)  
 
Determination of compression set at constant stress  
B.1 Apparatus  
Consists of two parallel, flat, rigid plates between which the test piece shall be compressed and the means of 
which a load of 140 kg ± 1 kg is applied.  
B.2 Test piece  
The test pieces shall be three discs of diameter 30 mm ± 0.2 mm of any thickness.  
B.3 Procedure  
B.3.1  Condition the test pieces at 2 5 ˚C ± 2˚C and 65 % ± 5 % relative humidity for 24 h.  
B.3.2  Measure the initial thickness of each test piece at the center using the gauge with part -spherical 
contact.  
NOTE  Take the arithmetic mean of three readi ngs as the initial thickness.  
B.3.3  Place the three test pieces on parallel plates of the compression apparatus and subject to a 
compression load of 140 kg ± 1 kg for 24 h.  
B.3.4  Release the load, remove the test pieces and allow to recover.  
B.3.5  After 1 h, measure the thickness and note the arithmetic mean as the final thickness.  
B.4 Expression of results  
The percentage compression set, shall be calculated as follows:  
 
where 
to is the initial thickness in mm; and 
t1  is the  final thickness in mm.  
100
oo1   −
ttt 
© EAC 2022  – All rights reserved  7 
 Annex C  
(normative)  
 
Determination of room temperature shrinkage  
C.1 Test piece  
Cut from the samples, test pieces of minimum dimensions 125 mm x 5 mm x 15 mm, after splitting all the sides 
of the sample.  
C.2 Conditioning of the test  piece  
Condition the test piece at 65 % ± 5 % relative humidity and 2 5 °C ± 2°C for at least 24 h prior to testing.  
C.3 Number of tests  
Carry out tests on at least three test pieces.  
C.4 Procedure  
Condition the test piece.  Measure the length of the tes t piece to the nearest 0.1 mm. Keep the test piece suitably 
in a closed chamber maintained at 2 5 °C ± 2 °C for 2 weeks. Remove the test piece from the chambe r and 
measure its length again.  
C.5 Calculation  
The room temperature shrinkage , shall be calculated as follows:  
   L0−L1
L0X100  
where  
Lo  is the length of the te st piece, in mm, before heating;  and  
L1   is the length of the test piece, in mm, after heating for two weeks.   
8 © EAC 2022  – All rights reserved  
 Annex D  
(normative)  
 
Determination of heat shrinkage  
D.1 Test pieces  
Cut test pieces of minimum dimensions 150 mm x 25 mm x 15 mm from post -cured sole by means of a knife.  
D.2 Conditioning of test piece  
Condition the test piece at 2 5 °C ± 2 °C temperature and 65 % ± 5 % relative humidity at least 2 4 h prior to 
testing.  
D.3 Number of tests  
Carry out test on at least three test pieces.  
D.4 Procedure  
Trace the test p iece on a piece of white paper.  Measure the length of the tes t piece to the nearest 0.1 mm. Keep 
the test piece suitably in an oven (Therm ostatically controlled) for 1 h at 100 °C ± 1°C. Take out the piece from 
the oven and cool to ambient temperature. Keep the test piece at room temperature for a minimum 2 h. Trace 
it again on the same paper and measure the length of the test piece on paper . 
D.5 Calculation  
The shrinkage , expressed as per cent, shall be calculated as follows:  
L0−L1
L0X100  
Where 
 
L0 is the length of the te st piece, in mm, before heating;  and 
L1 is the length of test piece, in mm, after heating and  cooling to room temperature.   
© EAC 2022  – All rights reserved  9 
 Annex E  
(normative)  
 
Determination of water absorption  
E.1 Test pieces  
Cut three pieces of 5 mm x 5 mm x 5 mm after shrinking all sides of the sample.  
E.2 Conditioning  
Condition for 24 h prior to testing at 2 5 °C ± 2 °C and 65 % ± 5 % relative humidity.  
E.3 Procedure  
E.3.1 After conditioning the test piece, weigh to the nearest 0.5 mg and immerse in distilled water for a period 
of 24 h at 2 5 °C ± 2 °C. 
E.3.2 Remove from the water, wipe dry the exposed surfaces with blot ting paper.  
E.3.3 Weigh the test piece again to the nearest 0.5 mg within 2 min of the removal of the test piece from 
water.  
E.4 Expression of results  
The water absorption , expressed as percentage, shall be calculated  as follows:  
100 MMM
00−
 
where 
M  is the mass, in g, of test  piece after immersion in water;  and 
M0 is the mass, in g of test piece before immersion in water.   
10 © EAC 2022  – All rights reserved  
 Annex F  
(normative)  
 
Determination of split tear  
F.1 Apparatus  
Tensile testing equipment with a rate traverse of 75 mm per minute.  
F.2 Conditioning  
Condition the samples for 24 h prior to testing at 25 °C ± 2 °C and 65 % ± 5 % relative humidity.  
F. 3 Test pieces  
After conditioning the test piece , cut three test pieces of 25 mm x100 mm along and across the direction of the 
bottom material of a bathroom slipper or a sheet. Prepare each test piece by splitting it with a knife or any other 
suitable method through midway between the top and the bottom surfaces for a distance of 30 mm fr om one 
end to form two tongues (s ee Figure F.1 and Figure F.2) . 
F.4 Procedure  
F.4.1  Clamp one tongue of the test piece on the upper jaw, and the other on the lower jaw.  
F.4.2  Start the machine and set the rate of separation speed at a constant rate of 75 mm per minute.  
F.5 Results  
After the test pieces have separated, note the maximum load and record the arithmetic mean of the three test 
pieces in Newton (N) as the split tear s trength of the sample.   
© EAC 2022  – All rights reserved  11 
  
 
KEY 
Dotted line shows knife cut  
Figure F.1 — Test piece before cut                               Figure F.2 — Test piece after cut  
 
12 © EAC 2022  – All rights reserved  
 Annex G  
(normative)  
 
Determination of strength required to pull strap from soling hole at the 
heel and toe end  
G.1 Apparatus  
Tensile testing machine,  with a rate traverse of 75 mm per minute . 
G.2 Test piece preparation  
Cut the test piece as shown in Figure G. 1, to have test pieces as shown in Figure G.2. For each test, cut three 
test pieces.  
G.3 Procedu re 
Insert on e of the test pieces cut from the bottom material (Figure G.1)  in the holding device and clamp as shown  
in Figure G.2 in the  tensile testing machine . Pull until the button comes off. Record the force in Newton (N). 
Record an average of three readings.  
G.4 Expression of results  
G.4.1  The force required to pull button through the hole in the sole.  
G.4.2   Malformation occurring to sole during procedure.  
G.4.3 Malformation occurring to strap during procedure.  
 
 
  
© EAC 2022  – All rights reserved  13 
  
 
Figure G.1 — 
 
Figure G.2 — 
 
14 © EAC 2022  – All rights reserved  
 Annex H 
(normative)  
Method of Sam pling and criteria for acceptance  
H.1 Scale of sampling  
H.1.1 Samples shall be selected and examined for each lot separately for ascertaining the conformity of the 
bathroom slippers  to the requirements of this standard.  
H.1.2 Bathroom slippers  shall be considered to be of different lots if they differ in shape , colour, size and design.  
 H.1.3 The number of bathroom slippers  pairs to be selected from any lot shall depend on the size of the lot and 
shall be in accordance with Columns 1 and 2 of Table H.1. 
H.2 Method of selection  
H.2.1 Bathroom slippers  to be sele cted from the lot shall be chosen at random. To ensure randomness the 
procedure in H.2.3 shall be used.  
H.2.2 When the bathroom slippers  pairs in a lot are not packed in a number of cases (boxes), the sampling shall 
be as follows:  
Starting from any bathr oom slippers  pair in the lot, count the pairs as 1,2, etc ---up to r and so on in one order. 
Every rth pair thus counted shall be withdrawn to constitute a sample (r is the integral part of N/n where N is the 
lot size and n is the sample size). This procedu re shall be stopped as soon as the required number of pairs is 
obtained.  
For example, if a sample of 125 pairs is to be selected from a lot of 3 000 pairs, compute r as equal to integral 
part of 3 000/125=24. Starting from any pair, the bathroom slippers  shall be counted in one order and every 
24th pair shall be withdrawn.  
H.2.3 When the bathroom slippers  pairs in a lot are packed in different cases (boxes), a suitable number of 
boxes (not less than 30 % of the total boxes in the lot) shall be first chose n at random. For each of the boxes 
so chosen, an approximately equal number of pairs shall be picked up from its different parts so as to obtain 
the required number of pairs.  
For example, if a lot consists of 1 000 pairs of bathroom slippers  packed in 50 boxes, each containing 20 pairs, 
choose more than 15 boxes at random. If it is decided to open 20 boxes, then 4 pairs shall be picked up from 
different parts of each of the 20 boxes to give a total of 80 pairs as specified in Table H.1. 
Table H.1 — Scale o f sampling and permissible number of defects  
Number of bathroom 
slippers  pairs in a lot  Samples for 
visually 
observed 
defects (Pairs)  Permissible 
number of 
defectives 
(Pairs)  Sample size for 
laboratory 
testing (Pairs)  Permissible 
number of 
defects (Pairs)  
(1) (2) (3) (4) (5) 
Up to 50  13 0 2 0 
51 to100  20 1 3 0 
101 to 300  32 1 3 0  
© EAC 2022  – All rights reserved  15 
 301 to 500  50 2 5 1 
501 to 1 000  80 3 6 1 
1 001 to 3 000  125 5 7 2 
3 001 and above  200 7 8 3 
 
H.3 Defects  
All randomly selected bathroom slippers  pairs (Table A.1, Column 2) shall be inspected for visually observed 
defects, i.e:  
a) difference in shape, design and colour;  
b) odd pairing and incorrect size;  
c) distorted shapes;  
d) blow holes and blisters ; 
 
H.4 Acceptance criteria  
The number of defective bathroom slippers  pairs shall not exceed the permissible number given in Table H.1, 
Column 3. If the number of defective pairs exceeds the permissible number of defectives, the lot shall be 
rejected.  
In case the lot has been found satisfactory for visually observed defects, sample pairs for laboratory testing 
(Table H.1, Column 4) shall be taken from among those drawn (Table H.1, Column 2). The pairs shall be chosen 
at random and tested for dimensional  and physical characteristics. If the number of defective bathroom slippers  
is less than or equal to the corresponding permissible number of defectives given in Table H.1, Column 5, the 
lot shall be declared to have met the requirements of this standard. Otherwise if the defective bathr oom slippers  
pairs are more than the corresponding permissible numbers of defectives, the lot shall be rejected  
 
 
 
 
 
 
 
 
  
16 © EAC 2022  – All rights reserved  
 Bibliography  
KS 1620:2021 Bathroom Slippers -Specification