RLX Ralph Lauren COOLMAX Quarter-Zip Sweatermidtown grey heatherRalph Lauren RLX's COOLMAX showcases the brand's innovative approach to sportswear design; while maintaining a sleek appearance, the fibres regulate your temperature and wick away moisture. Here, RLX blends COOLMAX with wool to create a polished quarter-zip sweater, complete with a polyester insert to block the wind.Ralph Lauren RLX's COOLMAX showcases the brand's innovative approach to sportswear design; while maintaining a sleek appearance, the fibres regulate your temperature and wick away moisture. Here, RLX blends COOLMAX with wool to create a polished quarter-zip sweater, complete with a polyester insert to block the wind.