What happens if you're in the field, working beneath a vehicle, and a 1.1 lb. projectile impacts your sunglasses from a 50-inch height? If you're wearing Gargoyles Vortex sunglasses, nothing. They take the hit. You're wearing very purposefully designed highly tactical protection. Vortex meets military specification MIL-PRF-32432(GL) for high velocity and high mass impact. They also exceed all ANSI Z87.1+ protection specifications, including, but not limited to, impressive optical clarity. And thanks to the TR90 NZZ frames, even the Gargoyles G-Loc hinges are 11 times stronger than regular TR90. The browbar and temples have co-injected rubber, which provides comfort, stability, flexibility and grip. With anti-reflective and Tri Tech oleophobic treatments, the lenses control harsh light and are both water and smudge resistant. Vortex is serious strength, dependability and protection for whatever comes your way.