Stanley Preslock Suspension White Hard Hat (RST-62002) High density polyethylene shell is lightweight and tough; patented shock absorbing hangers designed to absorb impacts evenly Adjustable PresLock suspension locks in the right fit with the turn of a knob Downward-angled nape strap offers a more secure fit; Easily add cap attachments with the universal accessory slots Recommended use: construction sites, trimming trees, roofing, climbing electrical and telephone poles Meets ANSI Z89.1 (2003 standard); meets Type 1 Impact requirements and Class G and E electrical