Abrasion resistant, ultra-durable WearSkin exterior material. Single Eyelet Lace Locking system prevents heel lift by locking the skate across the waist of your foot. New-Wrap cuff allows the skate to wrap further around the ankle eliminating contact between the cuff eyelets and the ankle bone. 3-3 stiffness rating; the first number is the relative stiffness of the heel and ankle area with 6 being the stiffest, the second number is the stiffness of the forefoot and the arch area with 6 being the stiffest.