The Terramar Silk/Nylon Mid Calf Sock Liner is lightweight and incredibly soft. Made using Terramar's ec2® Qwik-Dry™ electrostatic process, the Mid Calf socks lift moisture away from the foot and break it down for rapid evaporation. Better than a chemical treatment that can be worn or washed off, the silk fibers undergo a permanent molecular change that lasts and lasts. Perfect for skiing or snowboarding, this liner fits well under any socks. The Terramar Silk/Nylon Mid Calf Sock Liner is perfect for under your ski boots, or something to wear around your room at the lodge.