The Fox Baseframe Pro SL is a lightweight base layer with added D30 protection for the best of both worlds. The Baseframe is a lightweight layer that moves with your body so that you're not restricted. The D30 protection offers world leading impact protection that flexes and moves with your body as body heat will help the polymer to conform with your movements. The finishing touch is the built in hip padding for additional comfort. The Fox Baseframe Pro SL is a sleek and simple way to add another layer of protection for your rides.