Tri Flange Reusable Earplugs feature a triple flange design that helps provide a custom fit. The patented flanges and flexible stem are made of a soft, non irritating polymer to help provide protection and comfort.3M Peltor Sport Tri-Flange Corded Reusable Earplugs helps keep your focus by reducing your exposure to hazardous noises and providing a comfortable fit with your hat or other safety gear. The tri flange design helps you achieve a secure fit, and the soft, flexible feel is comfortable for extended wear. Whether you're shooting inside or out, reach for the quick and comfortable hearing protection of 3M Corded Reusable Earplugs. Noise Reduction Rating (NRR) 26dB.