Neiko 53880A 4-in-1 Safety Helmet with Hearing and Face Protection, Heavy Duty Hard Hat | Removable Ear Muffs and Visors Heavy duty hard hat meets all ANSI S12.42/S3.19 standard and are CE EN352-3 approved for highest quality and performance High strength, impact resistant helmet is equipped with a foam headband, soft plastic lining and cushioned ear muffs for maximum comfort and long wear Hearing block of up to NRR 22 and SNR 25.9 decibel range for a variety of projects dealing with chainsaws, brush cutters, trimmers, demolition hammers Lightweight, polycarbonate visor and steel mesh provides complete face shield and is interchangeable for a wide range of protection from hazardous debris Convenient dial knob is fully adjustable to fit all sizes circumference