Perfect fit: Ergonomically designed to reduce neck strain; Foam telescopic headband allows a personalized fit that holds securely in place without slipping, ensuring utmost protection; Cuff pads can be easily adjusted for non-stop comfort around head & ears. Dielectric: Ensuring optimal security, the dielectric insulation protects users from electric shocks and shorts; Our multi-functional design fully encompasses the ear for maximum insulation, while automatically blocking hazardous sound levels. Noise Suppression: Hi-vis ear muffs have a lightweight design build for comfort & convenience without compromising hearing protection; With durable ear cuffs made to withstand tough environments, they safeguard your hearing with a noise reduction of 25dB. Heavy-Duty: Featuring heavy duty non-conductive swivel fork arms, our earmuffs passively isolate noise while ensuring strength & durability; The hi-vis green/black ear cups are visible in low light conditions, providing additional jobsite protection. Certified: Ideal for professional use, it is practical for shooting, hunting, sports events, study, steel & hardware work, manufacturing, oil drilling etc.; HPD425 Premium Ear Muffs are independently tested and certified to NRR 25 (ANSI S3.19) and CSA Class A. Frequently Bought Together: Pair our 25dB Noise Cancelling Dielectric Safety Ear Muffs with Sellstrom’s 32dB NRR Disposable Uncorded Foam Ear Plugs to ensure maximum protection in high levels of sound exposure.