The Zildjian Standard Fit Hi-Fi Earplugs have a low-profile design that fits snugly in the ear without protruding, making them comfortable to wear under hats, helmets and other headgear. The sound quality is so good, they can be used by professional and amateur musicians. The neck cord makes it easy to take earplugs in and out while keeping them handy, and the carrying case attaches to keyrings or backpacks to make sure hearing protection is always at hand.