High density polyethylene. 6 point woven nylon suspension. Accessory slots accommodate a wide variety of eye, face, and hearing products. Accommodates chin strap. Moisture wicking brow pad is removable, washable, and replaceable. Secure fit ratchet and easy turn knob. Meets ANSI z89.1 Type 1, Class E. Fits head sizes 6 1/2-8.