-
It needs something with a bit of support to the loft, or to go on the outside over the insulating fleece and not next to skin. They were a faff to position, and then I found the repeated leg cycles shifted them around . There might be a convenient way, maybe like a foam (think glove padding) or spacer mesh with windproof face. ....all gets a bit roller-ball body armour-ey.... let us know how you get on!
Good to know on the 'leg burners'. I was about to make some as I bought some clo insulation to make burners for me and my mates (having made a test one with some thinsulate I had lying around). Probably won't bother if they don't work. Clo insulation is surprisingly cheap and the service from them was great.