Lysian concert earplugs are equipped with filters which can optimize the quality of sound. So help protect your hearing health when enjoying high decible entertainment events. Such as in music festival, concert and music clubs. Content in the box: Two pairs of transparent concert earplugs with metal filters in blue color and black color. Arriving with one portable aluminum canister for easy carrying the earplugs ( 1.06*1.65 IN ) Suitable for both Adult and child.