Material: Silicone Noise reduction rate: 40 Function: sound insulation, noise reduction, waterproof Use range: sleep, rest, work, exercise Efficacy: sound insulation, noise reduction, waterproof Packing: plastic storage box + color box Whether 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 hustle and bustle of quiet life has never been so simple 3. sound insulation upgrade effective filtering of living noise innovative sound insulation core accurate isolation of all kinds of living noise 4. Ergonomic design, comfortable to wear, fitting ear shape flexible tail precision fit ear ridge rolling does not fall off 5. Transparent shell, compact and easy to carry transparent shell packaging out of easy to carry Package Included: 1 * Earplug Set