PERFECT NOISE REDUCTION - Provides the best noise reduction to protect your ears from loud and noisy surroundings. Ideal for traveling, studying, snoring, shooting range, yard work, concerts, and all other loud activities. (NRR: 25 db/SNR: 28 dB) SOFT & HIGH QUALITY - Made of high quality, smooth, and soft silicone that makes it comfortable to wear. It's also a non-toxic material, so it's safe to use. WASHABLE & REUSABLE - Our earplugs can be washed and reused multiple times, anywhere from 2 months to a year. INDIVIDUALLY CASED & CAN BE USED WITH STRING - Each pair is individually packed in a plastic case. Each ear plug has a hole to apply a string or cord.