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The Know has a frame made from lightweight, flexible and durable grilamid and is suitable for almost any athletic endeavor. The hydrophilic rubber stays grippy even when wet, so the glasses will stick to your nose when you move, regardless of rain or transpiration. • Grilamid frame • Gripper rubber patches on nosepiece and temples • Complete UV protection (UV 400) • Corrective optical lenses will fit this frame KNOW FRAME DIMENSIONS Height: 51.5 mm Width: 135 mm Temple length (from hinge): 130 mm