2-LAYER THERMAL LINER – Water-resistant shell with soft fleece lining for warm and comfortable protection against the elements CHIN LENGTH – For complete head and ear coverage LIGHTWEIGHT & LOW-PROFILE – Fits comfortably under hard hats or helmets ELASTIC RIM – Creates a snug fit while trapping heat and keeping cold out HOOK & LOOP STRAPS – Chin strap plus 4 hook & loop hard hat straps keep liner securely in place ONE SIZE FITS MOST HARD HATS