Thin and light sock giving the closest possible boot fit. Ideal for custom boots where a no-bulk fit is desired. Has a close supportive fit from foot to calf. Prevents the sock from bunching which helps to ensure comfort. Knit with BE-FRESH Polypropylene that has properties to help prevent odor and bacteria from building up on the foot. Lycra fiber Is used in every sock in the Bridgedale range. It is an elastic fiber, which ensures Bridgedale socks