Conforms to EN 352-2:2002 H=31 M=27 L=24 SNR=31. Get comfortable hearing protection with 3M™ 1100 Earplugs. Easy to roll down and insert, their tapered design helps provide a noise-reducing seal in the ear canal. Made with a soft, hypoallergenic foam they react and soften with your body temperature offering a longer more comfortable wear. Fully tested and approved against EN 352-2 they can reduce noise levels by 37 dB. Model is compatible for use with the 3M™ E-A-RFit™ Dual-Ear Validation System and available as a probed plug. Available in refill bottles for use with 3M™ E-A-R™ One Touch™ Pro Earplug Dispenser for convenient on site easy access to hearing protection with reduced waste. Reduces noise levels up to 37 dB Tapered design provides a good fit on a wide range of ear canal sizes Soft hypoallergenic foam softens with body temperature once inserted for comfortable extended wear Compatible with the 3M™ E-A-Rfit™ Dual-Ear Validation System 3M 1100 earplugs are also available in the 3M™ E-A-R™ One-Touch™ Pro Earplug Dispenser format The 3M™ 1100 Earplugs are uncorded and the 3M™ 1110 Earplugs are the pre-corded version