DESIGN - Frame suitable for smaller faces. Same lens proportions as the original Flak 2.0, available in a smaller size.FRAME MATERIAL: Durability and all-day comfort of lightweight O Matterframe materialNO-SLIP GRIP: Unobtainium nosepads and earsocks become tackier when wet to help provide retentionSEE MORE DETAILS - PrizmLens Technology engineered to enhance color and contrast to see more detailOAKLEY PRESCRIPTION LENSES: Available with Oakley Authentic Prescription Lenses for consistent high quality in fit, form and function from lens to frame