Features: They are best for sleepping or work. Suitable for concerts, motorcycles, drummers, worker and noise sensitivities. Reusable and washable. The ergonomic structure design, fits the ear canal, and has an outstanding sound insulation effect. The earplugs are washable and reusable so that you don'for t have to replace them night after night. Specifications: Material: Silicone Size:Approx.27x22mm/1.06x0.87in Color:Pink,Light Green,Dark Gray,Dark Blue,Black,Light Blue,(Optional) 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