In skiing and snowboarding, taking the fall line refers to the line down a mountain that is most directly downhill - inspiring the cylindrical lens styling of this model. Fall Line is inspired by Line Miner and fusing the large field of view from a rimless goggle. Fall Line M is designed for a mid-size fit. Fit: Medium Rimless, cylindrical frame design helps increase visibility and improve helmet compatibility Available with Prizm™ Lens Technology is designed to enhance color and contrast so you can see more detail Microbag included for storage and lens cleaning Ridgelock Lens Change System Discreet frame notches at temples provide compatibility with most prescription eyewear Wide 40mm wide adjustable strap with silicone lining for a more secure fit Flexible O Matter® chassis conforms to your face comfortably, even in extreme cold All-day comfort of triple-layer face foam with moisture wicking polar fleece lining Injection-molded Plutonite® lens material provides 100% protection against UVA / UVB / UVC Optically correct Dual Lens with F3 Anti-fog coating Glare reduction and tuned light transmission of Iridium® lens coating (optional) Meets impact requirements based on ANSI Z87.1 and EN 166 standards