Noise reduction rating 29 dB. Use body heat to conform to the unique contours of your ears. Free travel case. Heat activated fit. Sleep, study, work, power tools, shooting sports, travel, loud events, etc. Ultimate comfort. No 1 doctor recommended. Latex-free hearing protection. Noise reduction rating 29 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 CFR part 211 subpart B. www.MacksEarplugs.com. Recyclable package. Made in USA.