EarPro EP3 Sonic Defenders Sonic Defenders® protect your hearing, without interfering with your ability to hear routine sounds and conversations. Safe sound levels are allowed to pass through while potentially damaging noises (above 85dB) are reduced via a proprietary design that incorporates the patented Hocks Noise Braker® Filter. Their attached stoppers can be inserted to further reduce low-level noise, like that heard when riding in an airplane. The right/left color-coded Sonic Defenders are made from a soft, hypoallergenic medical-grade polymer and ergonomically shaped to provide all-day comfort. And their low-profile design means they can be worn while wearing a helmet or mask, or while using a phone. Features: 24dB* Noise Reduction Rating (NRR) with stoppers inserted Lowers potentially dangerous noise levels above 85dB Hear safe sound levels (with stoppers out) as if you weren't wearing ear plugs Ergonomic design and double-flange stem design conforms to ear shape for comfort and secure retention Made from hypoallergenic, medical-grade polymer that's soft, durable, and long-lasting Low-profile design allows you to keep them in place while wearing a mask, helmet, hat, or while using phone, headphones, or supplemental hearing muffs Made in USA *NRR rating with stoppers inserted Specifications: Size: MD (Medium) - refer only to the outer earpieces that fit in the ear's concha bow Medium Size Fits: Concha Bowl equal to 1" Color: Black Package Weight: 0.9 oz / 25.5 gram Package Contents: EarPro® by Surefire® Sonic Defenders EP3 Earpieces. Packaged in a convenient carry case. UPC Code: 0-84871-31519-7