The original sock design that put us on the map. Features power bands of Lycra that hug the foot evenly for comfort and support. This snug, supportive fit eliminates movement to prevent blisters. Power bands of Lycra hug your entire foot for maximum support. This snug, supportive fit eliminates movement to prevent blisters.Ultra thin construction takes up minimal room inside the shoe.iWick fibers wick moisture to keep feet cool and dry.Y-heel construction keeps the sock from sliding into the shoe.The Perfect Toe (No irritating toe seam.) Sizing: