Athlete-approved and the flagship of the K2 Aggressive series is the Unnatural aggressive inline skate, geared for hard-charging skaters looking to push the boundaries of the sport. Built around a rich, black leather-textured upper, the Unnatural features 60mm wheels, a reinforced SoftBoot® construction to the upper, and the combination of a ratchet buckle cuff closure and replaceable mid-foot powerstrap. It also has the added comfort benefits of a shock absorbing foot bed. We went back to the drawing board and came up with a completely redesigned 1- piece soul for extra durability, with Teflon® inserts that reduce friction and allow you to slide almost any surface. It also utilizes the new UFS compliant frame that can be ridden flat or rockered without having to buy different size wheels.