These Beeswift QED banded Earplugs can be worn either over the head or under the chin. The foam Earplugs are pliable for a snug fit and disposable for hygiene. Conforming to: EN352-2:2002, with attenuation data of either: SNR 32db, H34, M28, L27 or SNR 32db, H33, M29, L28, these banded disposable Earplugs are supplied in a pack of 20.