Klein Tools K12 Series Carbon Fiber Hard Hats are constructed using multi-layered interlinked carbon fiber giving them the best low weight to high-strength combination. They feature large adjustable vents not found on other carbon fiber hard hats to stay cool in the heat. A balanced 6-Point suspension with removable, washable padded sweatband and top pad is designed for a secure fit and long-term comfort. Select K12 Series Carbon Fiber hard hats come with Klein Tools accessory mounts on the front and back for attaching Klein headlamps, fans, and other accessories: no strap needed True carbon fiber multi layered construction for great strength to weight ratio Class C, Type-1 Hard hat meets ANSI Z89.1-2014 (R2019)-(PLUS LT and HT rated) and CSA Z94.1-15 (R2020). Large adjustable vents can be opened and closed to manage air circulation. 6-Point suspension for stability and balance. Unique suspension system features a flexible open frame design to provide optimal fit and improved air circulation. Easy, one-handed adjustment with large knob ratchet mechanism even with gloves on, and soft neck pad that pivots to clear bandana knots and ponytails. Machine washable breathable, padded sweat-wicking sweatband and top pad improve comfort with advanced evaporative technology; simply wet and shake, for hours of cooling. Optional accessories and replacement parts include Rechargeable Headlamps (Cat. Nos. 56414, 56049); Sweatband, Top Pad, Suspension, Chin Strap (Cat. Nos. KHHSWTBND2, KHHTOPPAD2, HTSPN, KHHSTRP).