http://sn.1w6.org/file/mk-20161014T151818-lfz4c3q.html
@roland I have both, but there had been no heating on while I was away, and I sleep in a #hammock, so just a cover is not enough (you coll off mostly from below). Basically you need the surrounding air to be at a decent temperature - and that takes a while to warm up. I get all cramped up when i'm cold #brrrt!