Outer shell - polyester/ inner shell - polyester. Durable water and wind resistant outer shell. 3 heating zones which include l&r chest, and mid-back. Led controller with 3 temperature settings (high, med, low with pre-heat function). battery pocket accepts 20V max* XR Lithium-Ion batteries which improves run time by up to 25%*. USB power source with USB power port for charging portable electronic devices. Extension allows you to place it in front or back pockets.