The etymotic er20 ety plug clear stem is ideal for musicians concert goers or anyone who spends time in noisy environments and values sound quality. Designed to lower volume without distorting sound these earplugs reduce harmful noise levels while keeping music and speech clear. The er20 plugs feature a tuned resonator and acoustic resistor delivering high fidelity by mirroring the natural response of the ear canal. This lets you enjoy a realistic audio experience but at a safer volume level. Durable and reusable the er20 earplugs are made for regular use. They come in two sizes for a snug fit that stays comfortable during extended wear making them suitable for musicians on stage event goers or anyone in a loud workplace. With a low profile design a black neck cord and a storage case these earplugs are easy to carry and maintain.