I bought Pockets from Allon White - they are much bigger than the factory ones.
I use the latest version Kiess Heated Jacket for chilly mornings/days. Great solution IMHO - AND SWMBO - agrees!!!
The two Keiss are wired in - so all you have to do is a simple plug in. THere are 4 levels of heat - and we usually find that Medium is more than hot enough!