The 3M E-A-Rsoft Yellow Neons Uncorded Ear Plugs seal the ear canal with soft, slow-recovery foam for excellent noise reduction and reliable hearing protection. The tapered ear plugs are easy to roll down and insert, then expand within the ear canal for a comfortable, secure fit. Recommended applications include assembly and mechanical, chipping, chiseling, cleaning, drilling, furnace operations, grinding, heavy equipment operations, machining, metal repair, painting, pouring/casting, power fastening, riveting, sanding, sawing and welding. These ear plugs are commonly used in the following industries: agriculture, automotive, chemicals, construction, general manufacturing, healthcare, oil and gas, and pharmaceuticals. These ear plugs have a Noise Reduction Rating (NRR) of 33 dB. Ear plugs are made of a polyurethane. Test compatible with 3M E-A-Rfit Validation System. *Note: 3M strongly recommends fit testing of hearing protectors. Research suggests that many users will receive less noise reduction than indicated by the NRR due to variation in hearing protector fit, fitting skill, and motivation of the user. If the NRR is used, 3M recommends that it be reduced by 50% or in accordance with applicable regulations. Disclaimer: 3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e. g. , for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e. g. , U. S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and limitations. Misuse of 3M industrial and occupational products may result in injury, sickness, or death. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.