The Skullerz 8965 Lightweight Bump Cap Hat with LED Lighting is a comfortable and stylish hat featuring micro-LED lights and a ventilated impact-resistant shell for breathable protection against bumps, scrapes, bruises and other minor head injuries. At less than 5 oz, this incredibly lightweight bump cap delivers optimal comfort without compromising safety. Built-in dual-action LED lights under the brim emit 44 lumens for ultra-bright, hands-free visibility in the dark without flashlights or bulky headlamps. The LED task lights allow for close-up or distance lighting for visibility where you need it most. Run time is up to 11 hours with use of four CR2032 lithium-ion batteries (included). This bump cap tackles two big challenges workers face in the field: weight and heat. The removable bump cap insert is made of a lightweight but durable high-density polyethylene (HDPE). Lining the insert is a removable, washable and anti-microbial EPP foam pad. Style: Bump Cap; Material(s): HDPE; Polyester; Adjusting Method: Hook & Loop; Thickness: 0.2 mm.