Patent ID: 7950071

Claim:
A functional compressive sock including instep, sole, heel and toe portions which are subject to mutually different and appropriate compressions, said functional compressive sock comprising: instep and sole portions of said functional compressive sock being knitted from a Yarn A, wherein Yarn A comprises; a thread of high elasticity yarn composed of a thread of 520 denier polyurethane core yarn, double-covered with nylon 70D/24F/1 high speed textured yarn; and an inner thread composed of at least one of, a thread of a polyurethane based core single covered with long staple copolymer fiber, and a thread of a yarn composed of long staple copolymer fiber; and heel and toe portions of said functional compressive sock being knitted from a Yarn B having an inner thread composed of at least one of; a thread of a polyurethane based core yarn single-covered with long staple copolymer fiber, and a thread composed of a yarn of long staple copolymer fibers.