Haven't gotten a chance to write back what i thought of the HL muffs. I took them to the range Thursday. Overall, I would say they are pretty good. My ears weren't ringing when I was done. There were quite a few ppl shooting which was indoors. The guy 2 stalls down was shooting his AR and it didn't bother me at all.
The only thing that did start to bother me like others had said is after a while is the safety glasses pushing against the side of my head. I might try to work on a fix for that.
Hearing loss and problems like tinitis do not necessarily occur after one session. This loss can be gradual over a period of time. The real problem is that this sort of damage is permanent.