ER 20XS earplugs are discreet and have the identical response of ETY Plugs through 4 kHz. Above 4 kHz they have improved high-frequency clarity without compromising protection.
ER 20XS earplugs feature a low-profile, stem-less design that sits snugly in the outer ear without protruding. This makes it especially comfortable to wear under hats, helmets and other headgear. ER 20XS earplugs come with a small, flexible pull tab that allows for easy removal, an easy-to-install neck cord and a carrying case.