The slipper has an upper composed of woven material having a warp which extends parallel to the longitudinal axis of the slipper and a weft which extends normal to the weft. The weft has a larger degree of elasticity than that of the warp. The opening for a wearer's foot is defined by a margin which lacks any means for biasing the margin into contact with a wearer's ankle such that minimal pressure is exerted on the ankle by the margin.