The Asterisk Carbon Cell 1 (CC1) knee brace is designed with ultimate precision and performance in mind. Engineered from military-grade and aerospace carbon fiber, the CC1 brace is the lightest, slimmest, and most comfortable available, weighing just around 1 lb (454g) each. Their anatomical design ensures a perfect fit, almost as if they’re painted onto your legs, providing unparalleled comfort without sacrificing strength or durability. The CC1's patented Anti-Rotation Tether links the brace to your boots, providing exceptional lower leg stability by preventing rotational forces. Whether you're pushing limits on the track or trails, the Carbon Cell 1 offers the ultimate protection for both knees, backed by a 3-year frame warranty.Sizes:XS: 10-1/4"- 12-7/8"Small: 13" - 14-7/8"Medium: 14-1/4" - 15-3/4" Large: 15-7/8"-16-7/8"XL: 17"-18"