GOODR Sunglasses - Flex GNO SLIP Special grip coated frame with silicone inserts to eliminate slippage when sweating. NO BOUNCE Lightweight, durable frame that prevents bouncing while you crush that WOD. ALL POLARISED Glare reducing, polarised lenses with UV400 protection block 100% of harmful UVA and UVB rays. ALL FLEX Half rim frames with a fully adjustable nose piece that will follow your every move.