Patent ID: 7597946

Claim:
A shoe, comprising an upper and a sole, wherein the sole comprises one or more inflatable membranes for containing an inflationary gas, wherein at least one of the membranes comprises a multilayer composite, wherein the composite comprises at least one flexible layer comprising a low gel sheet formed from a composition comprising a blend of thermoplastic polyurethane, hydroxyl functional copolymer, and a gel reducing additive, wherein the composition comprises 0.05% to 20% by weight of the gel reducing additive, wherein the hydroxyl-functional copolymer comprises a) a polymer having 10 mole percent or more of repeating units of structure wherein n is 1, R1 and R2 are independently hydrogen, methyl, or ethyl, and R3 is hydrogen or C 1-3 alkyl, or b) a copolymer of ethylene and vinyl alcohol with 25-60 mol % ethylene, and wherein the gel reducing additive is selected from the group consisting of compounds with two or more hydroxyl groups, compounds with at least one primary amino group, compounds with at least one secondary amino group, compounds with at least one carboxyl group, and compounds with at least one carboxylic anhydride group.