Lightweight shell made with UV stabilized High Density Polyethylene (HDPE),4-Point suspension system,Revolution Wheel Ratchet is easy to use and creates a firm comfortable fit,Low nape strap provides a secure fit,Universal accessory slots accommodate a variety of eye, face and hearing protection products,Meets ANSIISEA Z89.1 and CSA Z94.1 Standards for Type 1, Class E,Unique 3D Adjustment provides a precise fit using harness depth settings,Made in USA