Noise Reduction Rating: 32 dB. Free travel case included. No. 1 doctor recommended. Made with Comfy Cush comfort foam. No. 1 doctor recommended brand to prevent hearing loss. Ultimate comfort. Sleep, study, work, travel, music, relaxation, loud events, etc. Extreme protection. www.MacksEarplugs.com. 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. EPA: Label required by USEPA Regulation 40 CPR Part 211 Subpart B. CE listed. Recyclable package. Made in USA.