Corded PU earplugs, 200 pairs

Corded PU earplugs, made of polyurethane foam, a soft hypoallergenic material. They protect against noise, with medium attenuation. Instructions of use: 1. With clean hands, roll the entire earplug into narrowest crease-free cylinder 2. Reach over head with free hand, pull ear up and back and insert earplug well inside ear canal. 3. Hold for 40 seconds, untill plug fully expands in ear canal. 4. Proper fit while in a noisy environment and with ear plugs inserted, cup both hands over years and release. The earplugs should be blocking enough noise so that covering them with your hands should not result a significant difference.