PROTECTIVE HELMET, INFINITELY ADJUSTABLE TRUSS Protective helmet in polypropylene (PP) or high-density polyethylene (HDPE), UV-protected. Low-density polyethylene (LDPE) truss with 8 attachment points. Potnik made of sponge. Tie with infinitely adjustable: head circumference from 53 to 63 cm. Electrical insulation up to 1000 VAC or 1500 VDC. Standard hole for attaching accessories. Fasteners for attaching a 2 or 4 point chin strap. Helmet: polypropylene (PP) or high-density polyethylene (HDPE). Sweat pan: sponge.