by ptc* » Thu Sep 04, 2014 7:44 pm
Sleeping bags are always a tricky one because it really helps to know how well you can sleep in the cold.
Down weight is the measure of warmth as well as fill power, 600g of 900 fill power down is lighter and warmer, if just a wee bit than 600g of 800 fill power.
Alway look past the hype and over dramatic descriptions and look at down content, official temperature ratings and the hood design. a good hood that cinches in is worth it's weight in gold (coloured down).
The last few winters I've tested dozens of different bags and your favourite might come down to body shape which varies and makes a huge difference to how warm you'll be, a slim bag is warm on an average sized person, a wide bag feels cooler because of all the dead air. But a slim bag that's too tight is no use as you'll flatten all the baffles, ruining the insulation qualities of all that expensive down fill.
Sleeping bags really have to be tried on for size.
Btw, one of the warmest options I've ever tried was in two PHD sleeping bags designed to go one in inside the other as a flexible year-round system. No extra weight but extra insulation.
