Ask a friend w/ the Howard Leight's to let you try them on first for fitment. For me at least, the cups leave open-air gaps below the ear due to the large size. However, I still use them (along with disposable plugs underneath) because of the ease of changing batteries. I have a pair of Peltor 6S that fit great, but it's a *massive* pain to change the batteries and the little foam mic-pickups are always coming off the plastic crenelated holders.