New and precise anatomical fit low profile shell - womens specific * High-end components for serious training and marathon skating - quick and maneuverable * Highest grade aluminum frame (12.60" frame) with racing axles Velcro over the instep with a ratchet top buckle insure a secure fit * Spiral high performance wheels (2 x 110mm with 2x100mm/84A durometer) larger wheels on front and back. Super fast SG9 professional bearings * The Tempest 100 provides performance fit and technology. The precise low cut boot profile allows superior range of motion while the front/back 110mm set up maintain speed and are smooth on rough surfaces