3 Force technology maximizes the transmission of energy from the leg and foot to the liner and shell; 3 Force Honeycomb construction pairs a light yet stiff frame that's especially responsive with a cuff and shell composed of a softer plastic; Nordica Gripwalk is an easy walking rocker sole interface that is ready to fit into the Marker Gripwalk bindings; Soft plastic inserts integrated into the throat allow for easy step in and step out of the boot; Infrared Technology releases pressure from sensitive areas and bunions; PrimaLoft insulation retains its insulating and lightweight properties for warmth and comfort, even when wet