Howard Leight Max Single-Use Corded Earplug MAX-30 (Box Of 100)The worlds most used polyurethane foam earplug Bell shape delivers maximum in ear comfort Contoured design easier to insert, resists tendency to back out of ear canal Polyurethane foam enhances comfort, especially for long term wear Smooth, soil resistant closed cell foam skin prevents dirt build up \ Corded Earplugs Recommended Industries Use Agriculture Chemical Construction Fire Protection Forestry Government Law Enforcement Manufacturing Medical