Coolmax® and acrylic fibers create a dry, healthy foot environment for sensitive feet. Nylon provides durability and cross stretch. A bit of Lycra® enhances four way stretch and recovery. The terry-cushioned sole absorbs shock and fits comfortably into casual or active shoes. Power bands of Lycra support the arch. The Y heel design helps prevent irritation and bunching. Order by color and men's/women's shoe size above.