Frame Size: 49mm NO SLIP. NO BOUNCE. ALL POLARIZED. ALL FUN. 1 NO SLIP We use special grip coating to construct our frame to help eliminate slippage when sweating. 2 NO BOUNCE Our frame is snug and lightweight, with a comfortable fit to prevent bouncing while running or crushing any workout. 3 ALL POLARIZED Glare-reducing, polarized lenses and UV400 protection that blocks those harmful UVA and UVB rays, because you deserve the best. 4 ALL HIPSTER/INFLUENCER/DYSTOPIAN FUTURE REBEL Whatever persona you're channeling, we guarantee no one wearing Circle G goodrs has ever been mistaken for not being cool. Or dope. Or whatever the lit people are saying these days.