Compared to the Hurricane Flight, the 661 Pro Bravo Carbon is a lightweight shell for mountain biking. If you’re looking for full-on DH protection, this helmet isn’t quite enough, but if you want full-face protection in a light helmet, this is an excellent choice. The shell is carbon-fiber reinforced fiberglass. The helmet is vented on top and back so air flows through. EPS foam liner conforms to face. The Pro Bravo Carbon meets CPSC standards for bike helmets. Available in "carbon" in sizes XS-XXL. 1045g.