H10a has the highest noise reduction rating on the market that has been tested by an accredited facility
An item consisting of two earcups, each of which are filled with sound attenuating material. It is designed to completely cover the wearer's ears and protect them from high intensity sound. It may include a headband or it may be designed for mounting onto headware, such as a helmet. For items containing earphones, see headset, electrical and headset-microphone. For items designed to be inserted into the ear, see plug, ear.
Classification: Safety headgear, whether or not lined or trimmed, n.E.S.O.I.
NSN 5950-01-385-6105
NSN 5905-00-009-9955
NSN 5950-00-820-8878
NSN 5965-00-805-4893
NSN 5945-01-243-4385
NSN 5905-01-471-8380
NSN 5905-01-561-3343
NSN 5835-01-043-1576
NSN 6220-00-260-9390
NSN 5930-01-210-4061
NSN 5985-00-003-5344
NSN 6620-01-440-3523