Ultralight karo-step down underquilt with some innovations (?) Video and Pictures!

[kduvey]

Hey guys, just finished my latest project and I'm so proud of it that I just have to show it off. Its an under quilt for 3-season backpacking.

I think there are some design details that many of you may be interested to see.

The specs:

- 13.2 oz finished weight, without stuff sack. (said 13.4 in video, I was wrong)
-60'' x 45'' (pretty big, lets say 4/5 for my 6' frame )
-7oz of 950 fp water resistant down - provides ~3 inches of loft which I'm thinking will get me down below freezing, maybe even down to 20 with an appropriate top quilt.

Materials:
-outer shell is calendared 1.0oz hyperD from RSBR
-inner shell is 0.66oz Membrane, also from RSBR
-baffling is noseeum mesh, 0.75-1.0 inch thick
-thread is blaze orange mara 50
-suspension consists of 1/8 inch shock cord and 1.25mm z-line from z-packs.

Interesting design aspects:
-complex differential cut with the karo-step, see video for explanation. Will elaborate here if people have questions. This design was such a PITA to calculate and to sew, but I think totally worth it.
-the z-line and shock cord combo suspension seems to be really quite nice. The z-line is ultralight and has the perfect amount of friction. See video.

Video:

https://www.youtube.com/watch?v=lhVg...ature=youtu.be


Pictures:

[boulderv7]

Man that is a gorgeous looking quilt. Very nice job. Love the colors. The thread is a nice touch as well.

[Scotty Von Porkchop]

Fantastic looking quilt. I'm a big fan in fact of lime green and karo baffles :-D

[psyculman]

Beautiful, well done!

[MAD777]

Great job! That's one fine looking quilt. That's a lot of mental work to calculate the differential cut for a Karo quilt. Where did you source the down?

[brianb]

Nice work, I like the karo baffles. Congrats.

[Madman4049]

Awesome underquilt and video man.

[awilhelm13]

man that's a beaut, very nice work! Looks quite cozy even on an ~90 degree day here in Boston!

[Beckyinma]

Exactly the size and design I'm thinking of doing. Great colors btw. Pardon my 'leet math skilz, how big are your squares, and how far apart are your baffle ends?

[kduvey]

Great job! That's one fine looking quilt. That's a lot of mental work to calculate the differential cut for a Karo quilt. Where did you source the down?

Thanks! and yes, the design on this quilt was very challenging. The down is from Quest I think.