Mack’s Flightguard Airplane Pressure Relief Earplugs relieve ear pressure discomfort as the result of flying on airplanes. Unique PR3 Design with Ceramic Filter is laboratory tested and proven to relieve air pressure. Reduces noise for relaxation - noise reduction rating -26 dB. Firm stem and super soft flanges ensure superior comfort and ease of use. Carrying case is included for convenient travel - includes 1 pair of earplugs.