New Balance offers three inserts for specialized comfort requirements. "Motion Control" has deep heel cup to prevent over pronation. "Ultra Arch Support" has tech-grade graphite arch support. "Pressure Relief" has Plastazote top layer that molds to the base of your foot to spread pressure evenly. "Multi-Sport" reduces friction and has support at heel, arch and metatarsal. All feature the advanced energy-return capabilities of SBS ABZORB in heel and forefoot. USA. XS (Fits 3 to 6-1/2) S (Fits 7 to 8-1/2) M (Fits 9 to 10-1/2) L (Fits 11 to 12-1/2) XL (Fits 13 to 15)