Fabric Information Lightweight 20d polyamide fabric Durable water repellent finish Synthetic Warmloft down-touch water repellent insulation Grown on hood with adjusters Special Features 2 zipped lower pockets Hidden elastication at cuff Adjustable shockcord hem Heatable Technology Active battery powered heating system 1 large heated back panel Easy operation Safety cut off Battery pack sold separately Can be used with any 5V - 2.1A Power Bank with USB-A output Battery not included