Marmot CWM EQ Sleeping Bag: -40 Degree Down - 2008 BCS

I used a Feathered Friends -40 bag at Denali basecamp for a 12-day mountaineering course. We never slept above 7300'--and the -40 bag wasn't too much; it was perfect. I was even cold one -35 night, though it was more due to my sleep mat that had a slow leak that deflated over the course of the night. (Thank God for my Z-rest backup pad underneath!!!) Anyways, -25 (or similar) is generally the most common temp rating sought out for Denali. You would be fine with this bag, though. Just be careful not to sweat in it so you don't damage the down. Unzipping the bag or keeping your head uncovered (and without a hat) is a great way to use this warm a bag in temps above -40.

January and February are the warmest and driest months to climb Kilimanjaro. Barring freak weather (which does tend to happen sometimes @19000ft) you're most likely to encounter temps that will hover around the single digits, up to the 20s on the summit, but after that one or two nights, you'll be right back down to altitudes that will rise at about 2-3 degrees F per 1000ft of descent, eventually ending up in an area and altitude that doesn't get much below the mid 60s at night. If you want to really cover yourself, a bag rated at no lower than -20F would more than suffice, and you could probably get away with something that's honestly rated @ -10-0 F. Also ask yourself if the value is there for only a single trip and if you're planning to use the bag in arctic conditions at least somewhat regularly, or if you would get more use out of a higher rated bag in the long run. Best advice: get a good double ground pad set-up with an insulated air mattress and a Z-lite, and become proficient at using the bag's zipper while half asleep in order to control your body temperature.

If you want a warm bag, this is it.

It's probably best to err on the side of having a bag that's a bit too warm than one that's not warm enough. The CWM is an proven bag that's been used on high altitude expeditions around the globe, so if it doesn't keep you warm, nothing will.

The stuffed dimensions are 9.5" x 19'.

A sleeping bag is only as warm as the user, and is largely determined by the loft. Down, traditionally, has offered the best warmth to weight ratio of any insulation. It's also very resiliant in that it maintains it's loft over many years, unlike synthetic. The Marmot CWM is one of the warmest sleeping bags available and you should be dying of heat at 32degrees, sweating being the biggest complaint. If your freezing in it, I would go see a doctor. It might be your hypothalamus acting up...(kidding of course). Unless there is something wrong with the bag, meaning all of the insulation at the feet has drifted elsewhere in the bag, you shouldn't be experiencing cold problems. Down drift can occur if the baffle material has been damaged or ripped. I would contact Marmot and possibly send the bag back to them for inspection...What(if any)sleeping pad are you using? The down on the bottom of the bag is compressed by your body weight and looses its insulating capability, therefore you need an insulating sleeping pad to keep you off the cold ground!

Stuff & storage sack included to store and pack your sleeping bag.

The weight of the regular sized bag is 4 pounds and 10 ounces. Check out the tech specs on the right size of the page.

the -20 bag will be fine but if it gets a little colder(which it will not)just put on a sweater and some sweatpants