①. Material: Silicone ②. Noise reduction rate: 40% ③. Function: sound insulation, noise reduction, waterproof ④. Use range: sleep, rest, work, exercise ⑤. Efficacy: sound insulation, noise reduction, waterproof ⑥. Packing: plastic storage box + color box ⑦. Whether washable: washable ⑧. Earplug head shape: umbrella ⑨. Noise Reduction Rating (NRR): 40% ⑩. Specifications: - Environmentally friendly silica gel, washable, can be washed repeatedly after use, protect the health of the ear canal - Noise reduction earplugs, stop the hustle and bustle of quiet life - Sound insulation upgrade, effective filtering of living noise, innovative sound insulation core, accurate isolation of various living noise - Ergonomic design, comfortable to wear, fitting ear shape, flexible tail, precision fit ear ridge, rolling does not fall off - Transparent shell, compact and easy to carry, transparent shell packaging, easy to carry out ⑪. Package Included: 1 * Earplug Set