IMMEDIATELY RELIEVES FOOT DISCOMFORT SO YOU CAN WEAR YOUR FAVORITE SHOES LONGER! CUSHION FLEX TECHNOLOGY: Works dynamically with your foot, flexing with each step to provide arch support. HEEL CUP: Heel cupping provides support & keeps heel in place. BALL OF FOOT: Wider design cushions entire area to relieve pressure. Removable without damage to shoes. Slim, sleek design won't crowd toes or make shoes feel tight. WOMEN'S SHOE SIZES 6-10.