Work great. will be buying more. cheaper hear than from manufacturers items on other sites - Pro-Ears OPMOD Tactical Hearing Protection Ear Muffs

Works better than howard lights.
Easy to use.
Surprised how good they are.
Better price hear compared to the manufacturers links on other sites.
"Earmor" the original manufacturer also has mic mod additions and a variety of cables you can buy for adding coms. As well as specific helmet rail mounts.

I will def buy again as it fit great and sounded as if the decibels where reduced beyond its 22 rating.