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The Marmon Helium 15 degree sleeping bag is reliable in wet conditions. It is light weight,
packable and it is going to be perfect for your next cold weather backpacking adventure.
The standout feature of this bag is its Down Defender, which is the type of down that insulates
this sleeping bag. Down Defender is a water resistant treatment that is applied to the
plumes of down used to insulate this sleeping bag. Since it is down, you are getting the
compressibility, the light weight warmth. But it actually performs a little more like
a synthetic bag in damp or wet conditions. Down Defender will stay drier longer than
regular down. It will dry out faster if it becomes wet. And it will ultimately keep you
warmer in a wet condition.
This is considered a 15 degree sleeping bag. However, the comfort rating on the EN or European
norm rating is around 27 degrees. The lower limit rating is around 17 degrees. So take
that into consideration when taking this bag into the back country.
You have got a six baffle hood which is going to keep your head a lot warmer at night. And
you also have a draw string that goes around the top and the bottom of the hood. So if
you need to cinch that down, it is really going to give you a lot of warmth and a lot
of comfort.
You have a full length zipper that is going to run all the way down to the foot box. And
the baffles in the foot box are also shaped more for the shape of your feet. So it is
going to taper in at the heel and the bottom baffle is a little bit wider just to accommodate
for more room around your feet.
It is a two way zipper. So if you need to vent the bag, you can vent that from the top
and from the bottom.
There is also a piece of fabric sewn behind the zipper for an anti snag design and a draft
tube behind the zipper to keep cold air out.
I have got the Marmot Helium 15 packed down into its included stuff sack. And you can
really see the compressibility of that 850 fill down. So you have got a high quality
sleeping bag that is going to give you a lot of confidence that you are going to stay warm,
stay comfortable in the back country on your next cold weather back country adventure.