SR-1 is the first in safety. They are formed to fit comfortably all day. Rubberized nose pieces and arms keep them from bouncing around. There is no need to ever have to adjust these once they are on. Stamped with the ANSI Z87+ in all 3 places prove you have the best PPE. Shooting at the range, working in the shop, or riding the steel horse…SR-1 are made for them all.