I bought a HD Heated Jacket Liner. I tried it out last weekend with temps in the 40s. I was very surprised at how well it worked. I removed the liner from my leather jacket and replaced it with the heated liner. It felt like when you take a shirt out of the dryer when it cuts off and put it on. The heated liner is made for HD by Gerbing. The Gerbing website has a lot of different heated gear. Looks like my DX won't be sitting still much this winter.