Widder has gone out of business.
I find the heated gloves and jacket liner are all I need to ride down to 0C/32F (with 3/4 jacket and insulated motorcycle pants).
I've tried both the Tourmaster Synergy and Gerbings Microwire liners and gloves (including powering both up). I ordered both online last Feb. so I could compare and ended up returning the Tourmaster stuff.
- includes temp controller which makes it about ~$60 cheaper in total
- temp controller with tiny push buttons does not look like it can easily be adjusted underway with gloves on
- less insulated than Gerbings
- fewer heat panels than Gerbings and less consistent heat of less of the body
- Tourmaster gloves had hot spots where I could feel wires
- thinsulate insulation over heated inner layer
- temp controller is easy to adjust under way with heavy gloves on
- more consistent and even heat over a larger area of the body
- more responsive to changes in temp, heats up faster
- life time warranty on electrics
- more expensive because it requires separate purchase of a temp controller
I find I need to frequently adjust the temp while riding to stay comfortable as my speed or other factors change. The ability to do this without having to stop I would say is hugely important. I clip my dual channel controller to the outside of my jacket to make this easy to do underway. You need two temp controllers or a dual channel controller for a jacket liner and gloves. This is because with one controller your hands will need to be too cold to keep from overheating your liner, or over heat your body to keep your hands warm. Jacket liners need to fit snug over just a thin shirt to transfer heat effectively. A heated collar is really nice, I find I no longer use my balaclava in freezing weather.