Mack's® Ultra Soft Foam Earplugs. 10 pair. Noise reduction rating 32db. Made with Comfy Cush™ comfort foam. #1 doctor recommended brand to prevent hearing loss. Free travel case included. Ultimate comfort. Sleep, study, work, travel, music, relaxation, loud events, etc. Extreme protection. Noise reduction rating 32 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). Federal law prohibits removal of this label prior to purchase. Recyclable package. (586) 427-7560. www.macksearplugs.com. ©McKeon Products.