HOW THEY WORK Vibes are reusable earplugs designed for sound quality. Traditional foam earplugs are only decreasing the volume of high frequency (treble) sounds, but not low frequency (bass) sounds, which is what causes the sound that you hear to be distorted when you wear them. On the other hand, Vibes lower the volume of all sounds equally, from bass to treble, which allows you to hear sound clearly, just at a quieter volume. Unlike traditional foam earplugs that block and muffle sound, Vibes filter sound. Using specially designed sound tubes that balance sound waves, and sound-enhancing acoustic filters that reduce decibel levels, Vibes allow you to protect your hearing health and stay comfortable in loud environments that would otherwise cause discomfort and hearing damage. Each purchase includes: - 1 pair of earplugs - 3 interchangeable fit sizes (small, medium, large) - Pocket sized hard case for easy storage - Contribution to Hear The World Foundation