The Sport Ear XT-4 Electronic Ear Muffs provide a 25 dB NRR and automatically block all sound over 85 dB. They feature lightweight polymer plastic for a comfortable, light fit and rugged durability. Sleek, low-profile cups are specifically designed for maximum effectiveness when shooting rifles. Offers four directional mics to pinpoint and enhance sound, as well as adjustable frequency knobs. Great for industrial and yard work too!