Maximum cushioning and comfort for extended periods. The ultimate "Summit Day Sock". Top: 2x1 rib welt top with nylon holds the sock up and in place. High density padding assures a comfortable snug fit and shin protection. Ankle Brace: Increased support above the ankle. Prevents slippage. Instep: High density padding protects against lace pressure. Arch Brace: Knit with nylon for increased support and comfort. Side Panel: Flat knit reduces compression. Provides better fit and maxamizes ventilation. Sole: Very high density paddng cushions against shock, blisters and abrasions. Content: 75% Wool, 21% Nylon, 4% Spandex