Why choose the HJC RPHA 1 Red Bull Austin Gp White Blue Mc21Sf Full Face Helmet? The HJC RPHA 01 is a great full face helmet by HJC for Race/Sport riders. Compared to any other style helmets, full face helmets provide the best overall protection as they cover you from top to chin. This is why you only ever see full face helmets on the track. When deciding on a new helmet and safety is your top priority you cannot go wrong with a full face helmet. Safety features of the RPHA 01. A helmet's job first and foremost is to provide protection. Constructed from Carbon, this White RPHA 01 ...