3M 1100 Foam Ear Plug Uncorded Earplugs 29 dB Noise Reduction Rating 200 Pairs Individual Packaging (200 pairs for 1100)3M 1100 Foam Ear Plug Uncorded Earplugs 29 dB Noise Reduction Rating 200 Pairs Individual Packaging Features: Smooth, dirt resistant surface provides better hygiene. Earplugs are easy to roll down for quick and easy fitting. Tapered design fits comfortably in ear canals. Soft polyurethane foam is hypoallergenic. Noise Reduction Rating (NRR) 29 dB, CSA Class AL. Specifications: Brand Name: 3M Model Number: 1100 Product Name: Foam Earplug NNR: 29dB