PERFECT NOISE REDUCTION - Provides Max Noise Reduction For The Peace, Quiet, and Sleep You Deserve. Perfect For Snoring, Shooting, Yard Work, Concerts, And All Other Loud Activities. NRR 28dBINDIVIDUALLY WRAPPED,CAN BE USED WITH STRING - Each pair is placed in plastic box. Ear Plugs have a hole to apply a string.WATERPROOF - protect your ear while swimming, and hold perfectly under the water.WASHABLE AND REUSABLE - our earplugs can be washed and re-used multiple times, anywhere from 2 months up to a year.SOFT NON TOXIC SILICONE - High quality SMOOTH soft silicone making them PLEASANT TO WEAR, NON TOXIC material so they are SAFE to use. Includes 10 pair (20 earplugs)