Feature: 1. SLOW REBOUND AND COMFORTABLE: Good earplugs should be the unity of high density and excellent plasticity. The measure of both is the chronic rebound time. Slow rebound, easy to insert into the ear canal, more comfortable to wear with good noise reduction effect 2. WASHABLE AND CONVENIENT: Safe and durable. Scrubbing is recommended to increase the life of the earplug. Place the earplug in a ventilated place and use the earplug after drying 3. ERGONOMIC DESIGN: The use of high tech research and development process, automatically adapt to the ear canal, long wear painless 4. 4 PAIRS IN TOTAL: The package contain a total of 4 pairs earplugs, enough for you to replace and use, very convenient 5. SAFE SILICONE: Adopt silicone material, environmentally friendly, non toxic and harmless, has good elasticity and softness, high temperature resistance Specification: Item Type: Noise Cancelling Earplugs Specifications: Approx. 1.2 x 2.5 x 4cm / 0.5 x 1 x 1.6in Product Weight: 30 g / 1.1 oz(approx.) . Package List: 4 Pair of Noise Cancelling Earplugs