Amazon Basics Ear Protection Click HERE for more information! Noise-reduction safety earmuffs help protect ears from loud noises; 23dB NRR (Noise Reduction Rating); ANSI S3.19-1974 certified. Ideal for sporting events, concerts, fireworks, home improvement projects, worksites, and more. Made of durable ABS and PU, along with a cushioning, noise-dampening sponge material. Over-the-head design with 4-point suspension and adjustable headband for a secure, comfortable fit. Compact, foldable design makes it easy to tuck into a backpack or carry on.