For skiing and snowboarding, the Fall Line gives the way, from the mountains directly down to the valley. The Fall Line XL is inspired by the Line Miner, and with the oversized field of vision of a rimless ski goggle, it's the latest addition to Oakley's "LINE SERIES" line of cylindrical-style ski goggles. The Fall Line XL has a great fit that's perfect for many face shapes. Its design is compatible with most helmets. Oakley's Ridgelock technology makes changing the lens quick and easy. An all-round seal protects the ski goggles from the elements. PRIZM - a revolution in lens optics based on decades of colour science in research. Prizm lenses offer unparalleled control of light transmission at which colors are precisely tuned to maximize contrast and improve vision.