Premium Polymer Material - Lightweight frames designed for durability; Gradient Lenses - Dark-to-light tint blocks overhead rays and increases ground visibility; Frame Measurements: 45-21-140mm (Narrow/Med Fit); No Slip - A special grip coating to construct the frame to help eliminate slippage when sweating; No Bounce - This frame is snug and lightweight, with a comfortable fit to prevent bouncing while crushing any workout; All Polarized - Glare-reducing, polarized lenses with UV400 protection that block 100% of those harmful UVA and UVB rays; All Angles - Angular, fashion-forward frames that are always trending...even if you aren't