Ultra-strong UA Power Clamp locks in your ankle for maximum support and power, but leaves enough mobility to hit your 3-point stance * UA Spine chassis technology delivers incredibly light, responsive cushioning without sacrificing support * Foot-forming 4D Foam collar molds to the ankle for a locked in, comfortable, customized fit * 3D-molded MPZ tongue uses UA"s ultra-light padding to protect the top of your foot * V56 technology is designed to help avoid over-extension