Smith Elite Aegis ARC Eyeshield. The Aegis Eyeshield offers maximized coverage and protection for high-impact environments. Whether you are deployed, training for a mission, or shooting for sport, the Aegis is the piece of eye protection you want with you. Good fit for hat size 7 1/4 or greater. Meets US Standard MIL-PRF-31013, ANSI Z87.1-2015 & EN 166 standards.