This multi-pack of Howard Leight Max single-use ear plugs are designed to give you convenient value, great protection and optimized comfort. The polyurethane foam ear plugs have a bell shape for maximum in-ear comfort, especially for longer wear. The contoured shape makes them easy to insert and keeps them from popping out of the ear cannel. They have a closed cell-foam skin that is smooth and soil resistant, for a clean design that prevents dirt build-up. The uncorded ear plugs are designated NRR33 Canada Class A(L). The package contains 100 noise-blocking ear plugs.