Professional goggles with light weight, slim profile and effective ventilation. X800L fit under most military helmets, and offers comfort, protection and visual field in great shape. Meets protection for the STANAG 2920 V50 (standard NATO) (V50 177 m / s (637 km / h) +. - Coated lenses for high resistance to scratches and misting, ballistic PC - 2.33 mm Curve 5 - Slim design - Adjustable 35mm elastic - Indirect ventilation - Helmets Custom design with quick release system - Supplied with soft case - CE marked - UV protection * The lens is certified to withstand projectiles (steel barrel, .22 cal) in the 177m / s