Built to deliver unbeatable impact protection that doesn't obstruct your view, Wiley X SG-1 Alternative Fit Tactical Goggles meet or exceed MIL-PRF-32432(GL) ballistic, ANSI Z87.1 optical clarity and high mass/high velocity impact, and US Federal OSHA 1910.133(b)(1)(1) safety standards. These tactical goggles feature a contoured Facial Cavity™ and adjustable back strap that form a tight seal to keep dust, dirt, and debris from penetrating the eye area. Included are a set of 2 interchangeable shatterproof Selenite™ polycarbonate lenses (Clear and Smoke Grey) that utilize T-Shell™ anti-scratch and Foil™ anti-fog coating to give you crystal clear visual acuity when you need it most. These ballistic goggles are Night Vision Goggle (NVG) compatible and come with an American made zipper case, removable temples, SG-1 elastic strap, and SG-1 beaded tactical strap.