The goodr MACH G is a classic polarized aviator style that combines a lightweight, non-slip frame with performance polarized lenses. Mach Gs replace traditional metal wire frames that often bounce or leave nose imprints. All goodr sunglasses feature a lightweight frame with a comfortable fit that prevents bouncing, a special grip-coated frame to eliminate slippage while sweating and glare-reducing, polarized lenses with UV400 protection block 100% of harmful UVA and UVB rays.