Features: Reusable and washable. The ergonomic structure design, fits the ear canal, and has an outstanding sound insulation effect. Ergonomic design, can be comfortable weared all day. Ear plugs for sleeping peacefully through the night, noise sound blocking out while you sleep. The use of high-quality silicone, soft and flexible, effectively fit the contours. Specifications: Material: Silicone Color:Black,Gray,Red, Option Type:Gray 2-layer Ear Plugs;Gray 3-layer Ear Plugs;Black 2-layer Ear Plugs;Black 3-layer Ear Plugs;Red 2-layer Ear Plugs;Red 3-layer Ear Plugs; Function: Sound Insulation Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Pair of Silicone Ear Plugs