If you come from a land down under, then you already know the Byron jacket is fair dinkum, which is the genuine real deal. Made with 100% polyester ripstop with a poly tricot liner. It will keep the bite of a chilly day away and keep you koala bear warm. We mean it. A DWR coating helps with wind and rain protection to ensure your jacket lasts. Detailed with a woven M/W label at chest. 100% Polyester