Worn once for an hour, don’t fit in my boots right. Stretch Fit Strap Technology – is an elastic material that expands and compresses, providing a comfortable and secure fit Dual Defense Knee Cups – two interactive knee cups slide with your knee's flexion and extension to provide complete coverage knee protection Hyperextension Lockout 30 – a hinge component designed to prevent the most common knee injury in action sports—hyperextension—by accommodating a variety of knees and riding styles, with hyperextension lockout from 0º-30º Comfort Cuff – a neoprene compression cuff is designed to wrap around your calf to limit lower leg migration 5-point Strapping System – is used to secure the knee brace firmly to your leg. Each strap is strategically placed and designed to function independently from the other Shark Skin Antimicrobial Liner – provides soft cushion support and a textured surface to limit knee brace migration Tru-Motion 2.0 Hinge – mimics knee movement giving the rider a more natural stance. Aluminum Carbon Fusion Frame – an aluminum lower frame fuses to a carbon fiber upper cuff, allowing for a lightweight and strong brace3