Mack's white ‘Pillow Soft’ silicone ear plugs suitable for sleeping, swimming and flying,great for sealing out water. • The original silicone earplugs. • Snore proof. • Helps relieve flying discomfort. • Waterproof. • Helps prevent swimmers ear. • Noise reduction rating 22 decibels (when used as directed). • Swim, sleep, study, shower, work, travel, sports, loud events, flying discomfort, and more.