Topic
Quilt warmth of a single layer of 1.8 primaloft.
Forum Posting
A Membership is required to post in the forums. Login or become a member to post in the member forums!
Home › Forums › Gear Forums › Make Your Own Gear › Quilt warmth of a single layer of 1.8 primaloft.
- This topic is empty.
-
AuthorPosts
-
Jan 18, 2012 at 2:14 pm #1284318
Purely a summer warm weather hyperlight quilt.
The inner will be .5 oz silk and outer .75 oz M55.
Should come in at 12 oz.I am thinking maybe 55dF ??
Thanks
Jan 19, 2012 at 5:55 am #1826600Just a thought, but I made a similar quilt out of 2.5 Apex that weighted in at 13oz and could go to about 45.
If you could find your hands on some of that, it might be easier to use and nearly as light. I believe I heard that thru-hiker hopes to get more this spring.
Jan 19, 2012 at 6:03 am #18266023 oz primaloft is about 2 clo
so 1.8 oz would be 1.2 clo
1.2 clo would provide about 75 F lower sleeping comfort limit if you were naked inside
What are you wearing inside?
Jan 19, 2012 at 7:45 am #1826632"1.2 clo would provide about 75 F lower sleeping comfort limit if you were naked inside."
Ah Jerry, now you've done it – you've gone ahead and introduced scientific values that help destroy marketing hype. ;|
To the OP, you might consider searching some of R Nisely's older clo value threads. In essence, you need a clo value of around 3.25 to be comfortable sleeping at 55 degrees F, and, as Jerry notes, around 1.2 to hit 75.
Interestingly, you only need a clo of around .8 (ie dressed) to be comfortable **sitting** @ 70-75. That means you're burning approx 1.5x as many calories sitting vs sleeping.
For those considering Sierra summer bags, 30 is the usual target range since it can (and does) dip below freezing even in August @ higher elevations. 30 requires a clo of around 6.5, which loosely translates to around 7.5 oz of syn or 2.2" of down loft. (Hence the 2" of loft [one side] in the 32 degree WM summerlite.)
Jan 19, 2012 at 8:18 am #1826638Good Richard thread:
http://www.backpackinglight.com/cgi-bin/backpackinglight/xdpy/forum_thread/9378/index.html
But, I think maybe it overestimates the required amount of insulation a little
Jan 19, 2012 at 10:39 am #1826697Richard's values are definitely conservative but accurate. This is probably because they're based of EN standards and they are designed to be accurate for a majority of the population, not just the average or median values (ie those clo values should work for 90% or so of people).
Also I think the linear regressions lose a lot of accuracy when temperatures are warmer, like 45F and above. But regardless the error still falls on the side of conservative so at worse you'll just end up with gear that's comfortable even colder than you intended!
-
AuthorPosts
- You must be logged in to reply to this topic.
Forum Posting
A Membership is required to post in the forums. Login or become a member to post in the member forums!
Our Community Posts are Moderated
Backpacking Light community posts are moderated and here to foster helpful and positive discussions about lightweight backpacking. Please be mindful of our values and boundaries and review our Community Guidelines prior to posting.
Get the Newsletter
Gear Research & Discovery Tools
- Browse our curated Gear Shop
- See the latest Gear Deals and Sales
- Our Recommendations
- Search for Gear on Sale with the Gear Finder
- Used Gear Swap
- Member Gear Reviews and BPL Gear Review Articles
- Browse by Gear Type or Brand.