Pillow soft silicone putty. Noise Reduction Rating 22 dB. Snore proof. Water proof. Helps prevent swimmer's ear. The original & exclusive formula made with non-toxic, hypoallergenic silicone putty. Noise Reduction Rating: 22 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). No. 1 doctor recommended. Maximum comfort. Swim, sleep, study, shower, work, travel, sports, loud events, flying discomfort, etc. Safe for use with ear tubes. Official Earplugs Swimming. www.MacksEarplugs.com. Federal law prohibits removal of this label prior to purchase. EPA. Label required by USEPA regulation 40 CFR part 211 subpart B. Recyclable package. CE Listed. Made in USA.