Navy. While I don't use it often, please refrain from purchasing if you are concerned. The heat defense is outstanding, but I am selling it because I have acquired another hat. 【About this product】 ・The outer fabric uses water-repellent nylon fabric. ・The inner lining uses "Thinsulate," a material with excellent insulation and heat retention. ・Machine washable. ・The Thinsulate inner lining is less affected by thickness changes due to washing, maintaining the silhouette and functionality. ・Nylon fabric is quick-drying and doesn't retain odors. 100% Nylon