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 5985-00-150-9398
NSN 6240-01-412-6426
NSN 5975-01-392-0436
NSN 5996-01-477-6709
NSN 5950-01-437-2412
NSN 5950-00-479-6715
NSN 5910-01-571-8500
NSN 6240-00-260-0399
NSN 2925-01-543-5571
NSN 4140-00-996-2248
NSN 6135-01-131-9352
NSN 6130-00-169-1958