This is a Allen Earmuff known as the Reaction Lo-Profile, model 2287.
The Reaction Lo-Profile Shooting Muff has a Noise Reduction Rating (NRR) of 26dB and meets ANSI S3.19 and CE EN352 requirements. The Lo-profile foam padded ear cups fold down easily for storage. Adjustable yoke.
Features:
Noise Reduction Rating (NRR) 26dB
Adjustable Yoke
Lo-Profile Foam Padded Ear Cups