Features: Earplugs for noise reduction in sleep dormitories, silicone, specifically for learning. They super soundproof for swimming. Silents earplugs, Sleepings soundlys without any sensation, powerful sound insulation and noise reduction effect, not pains when worn for long time. Noise reduction, 1 second in ear, stable and perfectly hiddens to wear, can be cleaned and reused. Full size earplugs with ear canals of different size. Silicone is comfortable to wear, filters and maintains sound effects while reducing noise; The materials more comfortable, safe, can be used in a healthy, environmentally friendly, and safe manner. Specifications: Materials: Silicone Product Size (Mm):20x15.5x15mm Charging Case Size (Mm):40x15mm Color: White, Black, Navys Blue, Lotuses Root Color (Optional) Package Includes: 1Set Silicone Ear Plugs note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item.