Temp Rating for 1 and only quilt

Sounds like you’ll be more than fine with the 30 degree especially since Katabatic quilts are rated comfort as opposed to EE or UGQ that rated to their limit. Heck you’ll probably be better off with their 40 degree based on where you’ll be going. You could always layer up if one evening it might drop lower than 40. Cheers

Thanks for the reply.  I appreciate it.

Yeah 30

Thanks for the reply. Appreciated.

Down has the ability to “adjust” to various temps.

As temps get colder, the air and surroundings get dryer. When you are cool you sweat a lot less (sans insensible perspiration.) This actually helps most down get a dryer, allowing it to loft a bit higher…more loft usually means greater warmth. Note that it can reach a point of condensing your own body sweat into the down and freezing up, but, I would suggest you wouldn’t use a 40F quilt in those conditions. 20F/-7C is about where this can start.

As temps get warmer, your body will sweat more. Down can pick up this additional moisture as a slight softening of the down plumes, hence reduced loft when added into the millions of plumes in your quilt. Of course, you can always kick a leg out, only cover half of you, or, simply use it as a warmer bed.

Usually the choice between 20F and 30F quilts is more the style of camping you do. As a UL hiker, I use a down jacket for cool mornings and evenings (roughly 6-8 hours.) I also use it for sleeping letting me add about 10F to a quilt’s performance. It is somewhat lighter to simply not carry a jacket and put extra down into your quilt.

Of course, this leaves you open/vulnerable to biting bugs.

Thanks for the thoughtful response.

If you are going to use the sleeping bag plus synthetic quilt combination make sure that the quilt you get is big enough to cover both the length and width of whatever sleeping bag you plan to use.

I’d go with the 30 for sure.  I currently have the Flex 22 and my son has the 30.  We have pretty much traded bags as I was completely fine for the 9 years I used a Chisos 40 down into the 20’s with no problems.  Katabatic quilts are conservatively rated for the overwhelming majority of owners.

Where you live, I’d go with 30. I just ordered a flex 30 with 2 oz of extra fill. Will drop it a bit. I’m in Alaska and get by with this new quilt for most of my needs. You can add your extra clothing for colder nights.