Invisible layer for your shoes made from sweat-wicking fabric with a supportive fit. The arch support provides excellent support and a secure, stable fit. A reinforced heel and toe for enhanced durability in high-wear areas. Rib cuffs for comfortable fit Arch support for a secure, stable fit Reinforced heel and toe for enhanced durability in high-wear areas Y-stitch heel pocket for a comfortable fit Pack of 3 pairs Size Index: Small: UK 2-5 Medium: UK 5-8 Large: UK 8-11 Extra Large: UK: 11-14