by Joomy » Sat 20 Jul, 2013 11:54 am
But this isn't Polartec Alpha, it's Berghaus' own synthetic fill which is more likely to be more similar to primaloft. And regardless of which side is in or out, the vapour barrier effect of the more windproof layer remains. I suppose the idea is that air can circulate within the insulation if you have the more air-permeable layer outwards but as I said above, the whole point of synthetic insulation is that it inhibits convection, so not sure how much practical difference this feature would make.