Looking for a 20 degree bag. A FF 20 with the nano shell or a WM. Which WM shell material would be a similar comparison to the nano, the extreme lite or the microfiber series? Just want to compare apples to apples. Thanks
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Western mountaineering or feathered friends bag
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From what I've read on their websites, It seems like the FF nanoshpere fabric will have water repellency like the WM microfiber faric, but at a slightly lighter weight,while the extremelite fabric is lighter than the nano or the MF but less water repellent. Whether the added water repellency matters is up to you.
I found the WM microfiber to be much more breathable than the FF Nano. I had a FF bag in the Nano fabric and felt clammy in it. It was also more difficult to stuff in it's stuff sack than the WM microfiber (unless turned inside out).
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