This is a Howard Leight Earmuff known as the QM24, model QM24PLUS.
These Earmuffs can be worn over-the-head" behind-the-head or under-the-chin. They feature Dialectic construction suitable for electrical environments and a Noise Reduction Rating (NRR) 25.
Features:
Noise Reduction Rating 25 dB
One Size Fits Most
Can Be Worn in Multiple Positions
