Specialized RBX Short biker shorts color is black size is large in excellent condition The soft four-way stretch fabric and articulated design ensure a perfect fit, but where the real comfort comes is from our Body Geometry 3D Chamois. It features a pre-molded shape that matches the curve of your saddle, reducing wrinkles and hot spots. Top it off with a super soft top sheet to reduce friction and you're left with all-day comfort.