The Industry Choice in Reusable Earplugs! Independently tested 27 Noise Reduction Rating – the highest third-party tested reusable earplug rating available! Patented, three-sided stem allows for stable, comfortable grip. Semi-rigid stem insert, bonded with adhesive, provides easy insertion without too much pressure. Soft, curved flanges help the plugs conform to the natural shape of the ear canal for all day comfort. Also available in a smaller size (Tri-Grip JR) and metal detectable versions (Tri-Grip MTek™ and Tri-Grip MD). All models available uncorded.