Thermal Sock Liners

Feet stay warm at 30 degrees below zero! Made of feather-light, durable, reflective fabric developed from aerospace insulation principles in NASA space program. Wear under your socks to seal out cold and dampness. Aluminized threads are woven through stretch-knit fabric to reflect back body heat like a mirror. Stretch to fit any size. Ideal for all outdoor workers, sportsmen. Hand wash.