Featuring a slim profile and comfortable cuff pads suitable for extended use; A fully adjustable, EVA foam telescopic headband allows for a personalized fit that holds securely in place without slipping, to ensure maximum safety. Compact: Thanks to its perfect size and foldable design, our ear muffs are easy to carry and store while effectively blocking hazardous levels of sound; The strong stainless steel wire swivel fork arms ensure strength and long-lasting durability. HP431 Ear Muffs deliver advanced noise cancellation with a slim built and low profile design; Adding to its ultra-lightweight construction, it also offers our highest noise reduction rating of 31dB, skillfully silencing out your world. Ideal for professional use, it is practical for shooting, hunting, sports events, study, construction work (steel & hardware), manufacturing, oil drilling etc.; Independently tested and certified to NRR 31 (ANSI S3.19) and CSA Class AL. Pair our 31dB lightweight Noise Cancelling Safety Ear Muffs with Sellstrom’s 32dB NRR Disposable Uncorded Foam Ear Plugs to ensure maximum protection in high levels of sound exposure.