These earplugs are designed to provide hearing protection in a variety of situations including sleeping loud noise concerts construction heavy machinery music and other noisy environments. They re also great for creating silence whenever you need it. The jar contains 50 pairs making it easy to take them with you wherever you go. The smooth comfortable extra soft and extra light foam material tapers to your ear canal for a custom fit ensuring maximum comfort for extended use. These earplugs are an excellent choice for anyone looking for convenient and effective hearing protection.