These Spenco Insoles feature a SpenCore layer that cushions your heel and forefoot. The Spenco Insoles have cushioning PolySorb polyurethane supports to fight fatigue and help relieve foot pain. Four-way stretch nylon top cloth reduces shear and friction that can cause hot spots and blisters. Antimicrobial helps control odor. Available sizes: XS (Women's 5-6.5), S (Men's 6-7.5, Women's 7-8.5), M (Men's 8-9.5, Women's 9-10.5), L (Men's 10-11.5, Women's 11-12.5), XL (Men's 12-13.5) or 2XL (Men's 14-15.5).