Since 1971, HJC has specialized in manufacturing motorcycle helmets exclusively. The combination of this extensive specialized manufacturing experience, innovative ideas, and reasonable pricing resulted in HJC's success in worldwide markets. It is HJC's continual goal to provide high quality, comfortable, and reasonably priced helmets to motorcyclists around the world. HJC HJ-20ST replacement Pinlock® prepared shield for the HJC RPHA ST Helmet. Optically superior Pinlock® prepared 2D face shield provides 95% UV protection. Innovative center one-touch open / close locking system is designed for an extremely secure seal. RapidFire™ II Shield Replacement System: Simple and secure shield ratchet system provides ultra-quick, tool-less removal and installation for efficient operation. Interchangeable and easily cleaned.