Patent ID: 8402674

Claim:
A slipper having a longitudinal axis which extends from a wearer's heel to his toe and a transverse axis disposed normal thereto, said axes lying on vertically extending longitudinal and transverse planes disposed normal to each other, said slipper having a sole and an upper, said upper having a dorsal portion and a vamp each of which taper to rear and forward edges, respectively, said rear and forward edges both lying on the longitudinal plane, said upper further being composed of woven material having a warp which extends parallel to said longitudinal axis and a weft which extends parallel to said transverse axis, said weft and said warp both having a degree of elasticity, said weft having a larger degree of elasticity than that of said warp, said upper still further having an opening for receipt of a wearer's foot, said opening being defined by a margin which has fore and aft portions which lie on the longitudinal plane and which margin is arranged and constructed to avoid a force which biases said margin against the wearer's ankle such that inward pressure by said margin on said ankle is minimized.