Klein Tools Hard Hats were designed and engineered for optimal safety, comfort and fit. Unique features allow the user to comfortably work in a wide variety of applications and demanding environments. Patent-pending accessory mounts on front and back ensure Klein Headlamps attach securely . no straps needed! Features: Safety hard hat has patent-pending accessory mounts on front and back ensure optional Klein Headlamps attach securely and precisely, every time . no straps or zip ties needed!; Breathable, padded sweat-wicking sweatband and top pad improve comfort and are machine washable; Adjustable vents can be opened or closed to control air circulation in hot and cold weather; Unique suspension system features a flexible open frame design to provide optimal fit and improved air circulation; Class C, Type 1 hard hat with adjustable vents meets ANSI Z89.1-2014, CSA Z94.1-15; EN397:2012+A1:2012-5.2.4 (Lateral Deformation-LD); EN12492:2012-4.2.1.2, 4.2.1.3, 4.2.1.4 (Front/Back/Side impact); Easy, one-handed adjustment with large knob ratchet mechanism (even with gloves on), and soft neck pad pivots to clear bandanna knots and pony tails; Universal accessory slots on both sides for attaching hearing protection, face shield and more; This model includes Klein Rechargeable Headlamp/Worklight (Cat. No. 56062) with charging cable; Accessories and replacement parts (sold separately): Rechargeable Headlamps (Cat. Nos. 56049, 56048, 56062), Alkaline Headlamp (Cat. No. KHH56220), Sweatband, Top Pad, Chin Strap, Suspension System (Cat. Nos. KHHSWTBND, KHHTOPPAD, KHHSTP, KHHSPN); Adjustable Vents; Patent-pending accessory mounts on front and back ensure Klein Headlamps attach securely and precisely, every time . no straps or zip ties needed!; Safety hard hat has patent-pending accessory mounts on front and back ensure Klein Headlamps attach securely and precisely, every time . no straps or zip ties needed!; This model includes Klein Rechargeable Headlamp/Work Light (Cat. No. 56062) with charging cable; Class C, Type 1 hard hat with adjustable vents meets ANSI Z89.1-2014, CSA Z94.1-15; EN12492:2012-4.2.1.2, 4.2.1.3, 4.2.1.4 (Front/Back/Side impact) - Warnings: Read, understand, and follow all instructions, cautions and warnings attached to and/or packed with all Hard Hats and Accessories before each use. Failure to follow these warnings and instructions may result in serious bodily injury or death. - Replaced By Products: 56062; KHHSPN; KHHSWTBND; KHHTOPPAD