The Nike HyperKO 2 Boxing Boots combines lightweight strength with lock-down containment for agility, support, power and footwork. Lightweight Cage Support: Overlays and skin provides support through a lightweight and mobile package. Sock Like Fit: Zonal stretch and lockout provides a seamless fit through a wide range of motion. Form Fitting Cuff: An industry first cuff construction provides enhanced performance and sensation. Nike Flyknit: Engineered to provide unprecedented fit & support. Nike Skin: Offers exoskeleton-like support through the ankle and mid-foot. Drop-In Cushioning: A PU drop-in provides protection & cushioning. Split Sole: Provides added flexibility & stability through the rounds Purchase these a half to 1 size up from your usual boxing shoe size