Feature: 1. Wide Application: This soundproof earplugs are very widely used for sleeping, studying, working, traveling, concerts, relaxation, flight discomfort and so on. 2. Excellent Foam Material: This soundproof earplugs are made of excellent foam material, which is soft and comfortable. 3. Ergonomic Design: This soundproof earplugs are ergonomically designed around the shape of the human ear, the center is the right size to fit the shape of the ear, breathable and comfortable, even when lying down, you can also be stable to wear the side lying down or roll over, sleep earplugs are not easy to slip off. 4. Convenient To Carry: This sound isolating earplugs come with an storage case, which is very convenient to carry around and use. 5. Lightweight Design: This sound isolating earplugs are lightweight and very comfortable to wear and won't interfere with your activities. Specification: Item Type: Sound Blocking Earplugs Material: Foam Specification: 4 Pairs. Package List: 4 Pair x Earplugs 2 x Storage Box