Ryders Eyewear Crankum The Crankum is fully adjustable so the nose pads and temple tips can be tuned for a perfect fit. The semi-rim, broken frame design optimizes airflow and reduces weight. HYDROPHILIC, ADJUSTABLE NOSE PADS + TEMPLE TIPS 100% UVA, UVB, AND UVC PROTECTION PHOTOCHROMIC LENSES  LIGHTEN & DARKEN AUTOMATICALLY GRILAMID TR90 FRAMES