optimised field of view in all directions. the oakley flight tracker upgrades the first true oversised goggle, the canopy, with a great design upgrade! the low profile frame design offers an optimised field of view in all directions and achieves seamless helmet integration. discreet notches on the sides allow you to wear your glasses under the goggles and enjoy full vision. the prizmâ„¢ technology and a wide, 50 mm strap round off the flight tracker xl perfectly!prizm snow black lensprizmâ„¢ lens was developed so that you don't have to change the lenses in every weather condition. the prizmâ„¢ adapts to existing conditions and ensures optimal colour representation, maximising depth perception and greatly improving visibility. in addition, the high-quality lens coating of highly heated metal oxides reduces glare.the prizm snow dark grey lens is suitable for bright light, sunny and changeable conditions.