It has 3 exchangeable acoustic filter sets that prevent exposure to excessive noise. The white filters offer low attenuation, the silver filters offer medium attenuation, and the gold filters offer high attenuation. Made of soft, flexible, and durable thermoplastic material, these earplugs easily adapt to the shape of your auditory duct to give a comfortable, snug fit. And, thanks to the transparent filters, they will mostly go unnoticed at parties or gigs, so you can enjoy your favorite musical events without worrying about those nagging headaches afterwards.