Bolle Google X1000 Ballistic PC - 3,0mm - Curve 5. STANAG 2920 Clear lens: v50 220.7 m/s (795km/h) High heat resistance TPV frame. Indirect ventilation frame. Equalizer ventilation technology Panoramic field vision. Comfort face contact foam. Lightweight: 120g Wide adjustable 40mm strap with non-slip technology. Pivot for helmet wearers. Quick release system Micro-fibre pouch around the strap. Supplied with black carry case