Just bought a Airvantage waist coat. If you have not seen one in the flesh it's a goretex waist coat which you inflate or deflate. Inflated its very warm(Like a heavy Fleece) deflated its just like a thin goretex vest. Have to say it is Pricey at £175 but if you can find one in a sale give it a Try. Has the added of bonus of being adaptable off the Bike.
