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, protects the health of the ear canal 2. Immersive noise reduction earplugs, block out daily noise for a quieter lifestyle 3. Upgraded sound insulation with an innovative core that effectively filters everyday environmental noise 4. Ergonomic design, comfortable to wear, fits ear shape; flexible stem ensures secure fit and stays in place 5. Transparent case, compact and easy to carry Package Included: 1 * Earplug Set