Adjustable: 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. Noise Suppression: 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. Certified: 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. Frequently Bought Together: 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.