K8 3.0 Forged Carbon. Now in two color combinations and a CE Level 2 Certification, the All New K8 3.0 Forged Carbon Knee Brace is setting a new benchmark in advanced design and rider safety for motocross and action sports athletes. Incorporating cutting-edge features tailored to optimize both support and protection, the K8 3.0 maximizes strength and comfort while ensuring uncompromising performance. Forged Carbon Frame and Adaptive Cuff. The exclusive Forged Carbon Composite is crafted by layers of military-grade carbon fiber sheets, pressed, heated and molded to optimize strength while reducing weight. The new Adaptive Cuff increases comfort by adapting to your leg size or shape, so it accommodates muscle motion and disperses load more efficiently. Adaptive Lower Frame.