The main criterion to keep in mind when choosing your fabric is the length of your inflatable boat, but it is also preferable to use the same quality as the initial fabric (your dealer can help you).
BOATS LESS THAN 5 METERS LONG : ORCA 820 or ORCA 828
BOATS LESS THAN 6 METERS LONG: ORCA 828 or ORCA 866
BOATS OVER 6 METERS LONG : ORCA 866
BOATS LONGER THAN 10 METERS : ORCA 859