5 ultra-thin heating elements, allowing for good heat distribution around the stomach, pockets, kidneys, and back; Compact and lightweight, you can easily fold up your jacket and save space in your bag; Vest made without materials of animal origin; Bluetooth function for control the heating level with your smartphone; Works with all external chargers (not included); Ideal for full enjoyment of outdoor activities; Outer: 100% Nylon Fabric; Lining: 100% Nylon; Collar: 100% Polyester; Insulation: 100% Polyester, 120gr; Weight: 360g (M)