The Howard Leight Max-Lite Ear Plugs offer superior noise-blocking performance - the world's most used Polyurethane Foam earplug.World s most-used polyurethane foam earplugContoured bell shape is easy to insertPolyurethane foam enhances comfort, especially for long-term wearSmooth, soil-resistant closed-cell foam skin prevents dirt build-upMAX Lite low-pressure polyurethane foam expands gently for comfortable long-term wearMAX Lite is ideal size for those with smaller ear canalsThe Howard Leight Max-Lite Ear Plugs has been constructed using Polyurethane foam which enhances comfort, especially for long-term wear. They come in a contoured bell shape which is easy to insert, and they have a smooth, soil-resistant closed cell foam skin which prevents dirt build up on the surface.The Max Lite low-pressure polyurethane foam expands gently for comfortable long-term wear, and is the ideal size for those with smaller ear canals.Sold as a pair.