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Does Windchill matter with a sleeping bag?
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Home › Forums › Gear Forums › Gear (General) › Does Windchill matter with a sleeping bag?
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Mar 8, 2013 at 6:53 am #1300180
How much does the wind chill matter when looking at the rating of your sleeping bag?
I was finally able to try out my 10F EE Quit this past weekend and it got really windy.
I went with the Outdoor programs at my school so I had to use their tent. Some how the fly blew off twice during the night and it was pretty much a open screen tent underneath.I'd say it got down to at least 20F before wind chill. Low said 17F looking online, but we were in a valley near a river, so not sure how much that would affect it. A cold front was coming in that night so it was fairly windy (5-25mph winds almost all night I would say.)
Long story short, I wasn't cold, but wasn't warm either. You think it was the wind that made me feel slightly cold in my quilt?
Mar 8, 2013 at 7:13 am #1963086Indeed. The convective heat loss can be significant with cold wind. A bivy may have solved this issue or a shell made of wind proof fabric (Windstopper). Or a tent/tarp.
Mar 8, 2013 at 7:15 am #1963087Everything you mentioned affects warmth:
wind
loss of fly
netting tent instead of solid fabric
valley (cold air settles in low spots)
river (humidity makes it feel colder)Replacing the fly a couple of times might have warmed you up a bit from the activity.
Mar 8, 2013 at 7:51 am #1963098What Daryl and David said.
Rocco, in my experience, the EE quilts are very conservative in their temp rating, so you being a little chilled isn't the quilt, but the way it was used: wind, loss of fly, etc, etc…
Also, what was your sleeping pad?
Mar 8, 2013 at 8:06 am #1963107If there is any forced (wind driven) airflow against/accross your sleeping bag than yes.
Will be worse the more breathable you shell is.
Mar 8, 2013 at 9:31 am #1963135I wasn't actually the one to go out and put back on the tent fly. Yeah, I was for sure warmer in the quilt than I was in my old 15F Big Agnes Grouse Down bag.
Also, now that I think about it, I think my old tent (Copper Spur 2) was warmer than when I started using my Tarptent Contrail.
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