Patent ID: 6862821

Claim:
In a shoe sole ( 2 ) having a multilayer structure, the improvements comprising: a top cushioning layer ( 5 ); a bottom tread layer ( 7 ) of elastomeric material; and an intermediate frame layer ( 6 ) of material for ensuring necessary rigidity of said shoe sole ( 2 ) when said top cushioning layer ( 5 ), said intermediate frame layer ( 6 ) and said bottom tread layer ( 7 ) are superimposed and fixed to one another; wherein said intermediate frame layer ( 6 ) has a number of through openings ( 13 , 14 , 15 , 16 ); and wherein said bottom tread layer ( 7 ) has in one niece a heel portion, a forefoot portion located to correspond with said openings ( 13 , 14 , 15 , 16 ) in said frame ( 6 ) upon said superposition, a number of rocking blocks ( 30 , 31 ).