Rechargeable Roughneck LED Hat provides hands-free-lighting; great for adventures and maintenance! Features exclusively secure notched design — simply align the light's notch with the hat's groove, then snap together! Detachable USB light requires ZERO CABLES. Simply remove the COB LED light from your hat, and directly charge via any USB port. Each hat features heavy duty insulation for extra warmth. Adult sizes. Includes a variety of black, blue and red knitted beanie hats.