BELL Rubicon Pro Helmet   For serious mountain bikers, this helmet offers performance, style and safety in an attractive package. 26 vents offer frontal air venting at high speeds, and passive and rear vents at low speeds. Fusion-Fit retention system snugly holds helmet against your head with an integrated vertical and horizontal adjustment and is ponytail-compatible. Cam-Lock retention system with 1/2" straps ensures a hassle-free, fast, sure fit.   $99.00