The best features of the J501 Keis premium heated jacket are:Lighter, thinner construction for a more streamline fit under your motorcycle jacket.The very latest Micro Carbon Fibre heat pads for advanced heat radiation, providing an even layer of heat across the targeted chest, back, arms and collar areas.More leisure pockets and a dedicated heat controller pocket, for increased convenience and ease of use.Note: Free Keis Heat Controller included with every Keis Premium Heated Jacket.Available heated jacket sizes:46 (90CM/36IN in chest size) to 60 (125CM/50IN in chest size)Due to the elasticated side panels you may find you need to order the chest size smaller for a snug fit. A snug fit provides the most efficient transfer of heat from the heated jacket, through your required under layer (e.g. long sleeved t-shirt), to your upper body.What you get with the J501 Keis heated jacket: Keis Premium Heated Jacket J501Keis Vehicle Supply LoomFREE Heat ControllerInstructionsFeatures:The very latest heat generation technology, using Micro Carbon Fibre for extreme comfort and reliability.The latest design in breathable lightweight soft shell fabric, with stylish elasticated side panels provide a perfect fit for men and women.Designed to be worn as an inside layer or stylish outer jacket.Dedicated zipped pockets for cables and Controller to keep things tidy and easy to find.Convenient lifestyle pockets for increased practicality.Strategically positioned heat panels on chest, down the back, arms and collar provide extreme warmth.Complete with all required wiring and full easy to follow instructions.Available in Black, with red side panels, and complete with motorcycle/vehicle wiring harness.Free Heat Controller included.Current Draw 5.5A. Typical Power 66W.Please Note:1. While this heated jacket can be powered by a Keis Portable Battery Pack, we believe that this may not be very practical. As the heated jacket draws 5.5Amps of current to heat the many different Micro Carbon Fibre heating elements, a battery will not last for a long period of time. This includes the 2600mAh and the 5200mAh Li-Ion Portable Battery Packs.2. Can also be powered via the Keis Cigarette Lighter/DIN Power Supply Lead (available as an optional accessory).