3M 1291 Green Earplug, 21 dB features: Made of soft foam that provides excellent ear protection with a noise reduction rating of 21dB. High comfort and fit with a smooth surface texture. Provides an ergonomic fit that conforms to the shape of the ear canal. The foam earplugs can be used in environments with high levels of noise. It is comfortable to wear for extended periods, even during long working hours. 3M™ Green Earplugs have been tested to meet the NRR standards. Highly effective ear protection solution for noisy environments, such as construction sites and factories. Recommended sectors/uses: Metal Industry, Automotive, Textile, Construction, Aircraft, Woodworking, Painting. Hazards: Noise, sound. Certifications: EN352-2:2002 Hearing protection: Earplugs