DetailsLasting Size Chart These knee high ski socks are made of the highest quality Australian merino wool, which ensures dry skin and provides excellent thermal insulation and moisture removal. These socks have been designed to please even the most advanced skiers. The ski sock was specially designed for ski boots and utilizes several bonding layers which create several zones with various properties, thus improving the overall comfort. They have high resistance to wear and tear, and have reinforced areas at the pressure points. These socks also have reinforced zones on the bottom and around the Achilles‘ heel. A large area fitted with a three-layer plush bond protects the shin and calf areas. In addition they have silver ion added into the fabric which is proven to help stop the proliferation of fungus and odor-causing bacteria.