Howard Leight by Honeywell Max Uncorded Earplugs feature a bell shape for optimum in-ear comfort and have a contoured design which helps in easier insertion while resisting the tendency to back-out of ear canal. Plugs are made from polyurethane foam that improves comfort for long term wear and the soil resistant closed cell foam avoids any dirt build-up. The noise reduction is rated at 33 dB and can be used in automotive industry, aviation, forestry, furniture manufacturing, landscaping, metal fabrication and more. Earplugs come in a poly bag.