K2 Softboot ?, the original, delivers unmatched comfort with the best fit on the market * 420 Longmount Frame is the fastest straight one hundred four-wheeled frame on the market. It features an aluminum alloy longmount frame that is heat-treated for increased stiffness. * This sculpted cuff is designed to be low profile while utilizing ultra-light materials to hug the ankle. Experienced skaters will appreciate this minimalist design that allows technique to take over. * Super-fast ILQ-9 Classic Plus Bearings. 100mm 85a Star Wheels for a super fast smooth role to get you to the finish line faster. In 2002, TwinCam introduced a 6 ball design engineered specifically for inline skate usage. * K2 Women?s skates are lasted with true women?s lasts on both the full and half size. K2 is the only skate brand that does this. K2 Women?s cuffs are scalloped to accommodate for a woman?s lower calf shape, thus a more comfortable skate.