Two levels of hearing protection for the price of one! Insert the yellow end for variable level of protection for outdoor ranges, and use the olive end for a higher level of constant protection at indoor ranges. Used by US military and NATO. Not CE certified.
Plastic Container with Chain and Loop
Designed for Use by U.S. Army and NATO
Indoor (olive) End has Constant Noise Reduction Rating (NRR) of 22 db
Outdoor (yellow) End is Noise Activated and has an NRR of 22db