Material: Silicone Noise reduction rate: 40% Function: sound insulation, noise reduction, waterproof Scope of application: sleep, rest, work, exercise Effect: sound insulation, noise reduction, waterproof Packaging: plastic storage box + color box Washable: washable Earplug head shape: umbrella Noise Reduction Rating (NRR):40% Specifications: 1. Environmentally friendly silica gel, washable, can be washed repeatedly after use, protect the health of the ear canal 2. Immersive noise reduction earplugs, stop the stress and bustle of life, a quiet life has never been so easy 3. Sound insulation upgrade effective filtering of everyday noise innovative sound insulation core precise isolation of all kinds of everyday noise 4. Ergonomic design, comfortable to wear, fitting ear shape flexible tail precision fit ear comb does not roll off 5. Transparent shell, compact and easy to carry transparent shell packaging easy to take with you Package includes: 1 * Earplug set