Dual Purpose Earplugs, Dual Purpose Earplugs Removable cord. Reusable and washable. Incredibly soft seal rings for extreme comfort. Seal out noise; 27 NRR for power tools, loud concerts, shooting, racing events, etc. Seal out water: swim, shower; bathe; water sports. Noise Reduction Rating - 27 decibels (when used as directed). The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (high numbers denote greater effectiveness). CE listed. Made in U.S.A.