the impact sports are only NRR22. for just a bit more you can get the impact pro which are NRR30, a massive improvement.
The higher nrr the better. Those Howard Leights Impact Sports do not have enough noise reduction in my opinion. You cannot get your hearing back once you lose it.
These are better imho: Howard Leight by Honeywell R-01902 Impact Pro Sound Amplification Electronic Earmuff, Black https://www.amazon.com/dp/B007BGSI5U/ref=cm_sw_r_cp_awd_hiCbxbD8TZB4W
the peltors are in another league entirely compared to the howard leights. NRR26 compared to the NRR22 of the howard leights.
value for $$ the howard leight impact pro (NRR30) are way better than the impact sports.