ProCase Professional Safety Ear Muffs are constructed with noise-dampening sponge material and offer a NRR 28dB (SNR 34dB) rating, certified by ANSI S3.1. They feature an ergonomic double-deck headband for comfort, with generous space inside the ear cups for breathability and soft imitation leather for a sound-proof seal. The ear muffs are built with a solid ABS-shell and thickened noise-dampening foam, providing a SNR 36dB (NRR 29 dB) rating, certified by ANSI S3.19 (US) and CE EN352-1 (EU). The retractable stainless steel headband and 360 rotatable ear cups with comfortable foam are adjustable to fit all sizes. Durable yet lightweight, these ear protectors are ideal for shooting, hunting, sports events, studying, woodworking, and lawn care, and are suitable for operating heavy machinery or landscaping businesses.