Set and forget Roc Loc TT Fit system creates a self-adjusting fit with secure feel and helps improve aerodynamics by allowing back of the helmet to be closed off to the wind * In-mold polycarbonate shell with EPS liner * Internal channeling ventilation with 24 wind tunnel vents and X-Static padding * Featherweight webbing with Slimline buckle * Thermoformed SL Roll Cage reinforcement