Rail XC in Crystal Clear takes the same performance as Rail, but streamlined in a smaller lens and lighter design. Rail XC's rimless shield keeps eyes protected from debris while still offering maximum airflow. Rail XC comes with a shatterproof Clarion Blue Fototec lens with a tint that gets darker with sunlight exposure. The perfect companion for road and gravel cyclists. FEATURES : Optically Decentered: Eliminates distortion & magnification Polycarbonate lens: Scratch-resistant, shatterproof material UVA/UVB Protection Grilamid TR-90 Frame: Light and durable nylon materila Glare Guard Adjustable Nose Pieces Adjustable Ear Pieces with Hydrophilic Rubber Case Included