In skiing and snowboarding, taking the Fall Line refers to the line down a mountain that is most directly downhill. Inspired by Line Miner and fusing the large field of view from a rimless goggle, Fall Line XM is the latest addition to Oakley's LINE SERIES of cylindrical style snow goggles. With a mid-sized fit, Fall Line XM is optimized for a wide variety of faces and is engineered to fit perfectly with most helmets. Designed with Oakley's Ridgelock Technology, changing lenses is quick and easy while still allowing for a complete lens seal to prevent harsh conditions from penetrating into your goggleTechnology:- Prizm™ Snow: Oakley's exclusive lens technology that's engineered to help you see contrast on the mountain in a variety of challenging light and snow conditions.