Go lightweight with this sleeping bag for warmer temperatures. Stick your feet out of the new J-zip on those especially warm nights in July and August.
We are taking a look at the Mountainsmith Ptarmigan 35 degree sleeping bag. This is going to be a great option for back packers and campers who are looking for a summer bag that isn’t going to break the bank.
This is a synthetic bag and it is insulated with Mountain Loft Hollow fibers. So you have got a nice synthetic material there. It is made to mimic the structure of down so it is going to be compressible. It is going to be packable. But it doesn’t weight a lot. And the great thing about synthetic insulation is that if it becomes damp or wet it is going to dry out really quickly and it is going to retain its thermal efficiency even if it becomes wet.
The stand out feature, I think, about this bag is this J shaped zipper. So this is a semi mummy shaped bag. It is pretty roomy as far as mummy bags go. So it is more of a relaxed shape. You do have your traditional mummy hood at the top. You have got a pretty wide girth with this bag. And then as it tapers into the foot box you still have pretty much room to move around. So, you know, you do have a nice boxed foot box. The top of the sleeping bag isn’t sewn to the bottom, so you can see this nice box shape here. It just gives you more room for your feet and it is just more comfortable over all.
But this J shaped zipper goes all the way down to... mostly all the way down to the end of the sleeping bag. The thing I like about this is, you know, in the summer, in the early fall or the late spring when you definitely need a sleeping bag to keep you warm at night, but you might want to vent it, this J shaped zipper you are going to be able to open that up and stick your feet out while still keeping the top of the sleeping bag attached with that zipper. It is a two way zipper. So you can open the top and vent that way, too.
If you do want to vent the top of the bag you can attach that Velcro piece and, you know, still kind of keep the top up near your head. Or if you want to vent it out completely you can just fold that over so you don’t have to worry about the Velcro coming against your face.
Behind this zipper you have a nice durable material that is supposed to prevent snags. So if the bag were to become snagged that durable material isn’t going to rip. But it definitely cuts down on snags when you are zipping and unzipping the bag.
Going through the features, again, you have a nice hood up here and it is shaped really nicely so when you cinch down the top of the bag it can cinch down around your neck and keep you a lot warmer. So if you are at the lower limit temperature for this bag, you can really cinch it down and keep you nice and warm.
Another stand out feature of this bag is the baffle design. So you have got vertical baffles here on the top of the bag right over top of your core. And vertical baffles are nice because they transfer the heat from your core up and down rather than side to side. So this definitely keeps you warm. But then on the sides and the bottom of the bag you have more of a horizontal box baffles.
Mountainsmith does use European norm or EN ratings for their sleeping bags which gives you a nice comfort level and a lower limit level. The comfort level for this bag is more around 42 degrees Fahrenheit and then the lower limit would be closer to the actual 35 degree in the naming. So before taking this into the back country, be sure you check out the EN ratings.
This bag comes in one size. You know, you do get a generous size with this bag and because it is a warmer weather sleeping bag, it does pack down to be pretty small. So check out the specifications on our product page.
And, all in all, this is a really great value conscious option for camping, backpacking or traveling. It is definitely a multi use bag.
It is the Mountainsmith Ptarmigan 35 degree sleeping bag.