I bought this to use as a range officer at a covered outdoor range and for use with long guns as well as pistols.
These work great for carring on a conversation in a normal manner while gunfire is occuring closeby. Words are not clipped off, the gunfire is atenuated down to a safe level.
The slim is adequate for all but the larger cal. rifles without muzzle breaks and pistols up to 45acp. Above that they can be supplemented with ear plugs.
I wear them in the Tx heat and only occasionaly have to wipe away a small amount of perspiration. They are much more comfortable than the ones they replaced.
Pros: Comfort, quality
This review was written in the old system and had content requirements that are different than reviews written today.