Worn once. 85% Australian Merino Wool, 12% Nylon, 3% Spandex Non-Mulesed Wool Woolmark® Certified Woolx DuraLite® Fabric FABRIC WEIGHT: Lightweight 150g/m² EASY CARE Follow these tips for the best performance and longest life for your garment: Machine Wash Cold Inside Out And Tumble Dry Low. Avoid Fabric Softener. Though It Won't Damage The Clothing It Does Coat The Fibers In A Wax That Neutralizes Many Benefits Of Merino.