CCM Extreme Flex 4 Pro Leg Pads feature a single break outer flex a pre-curved single break core at the inner flex a 90 degree boot flex with torsional flex a deep ultra soft boot channel a tight fit no calf strap a no strap- 2” elastic knee strap system and a recessed foam knee cradle with (removable) knee cradle wrap. DUALITECORE Technology in the core. 3D Grip / Injection molded EPP foam knee raiser.