Speed Hump
As the name suggests, this feature originally came about as an aerodynamic aid so when at speed, airflow was interrupted less over the helmet and down across the centre back. They have, however, become as much a cosmetic feature in suits for those appreciating the look of true racers.
Available in small form for jackets and larger versions for the one-piece suit. This large version is available in regular or hollow, the latter enabling space for a hydration pack (not supplied) or simply to act as one large scoop to channel cool air into the rear of the suit.