I paired up a $20 Cosco down throw with a $21 lightweight Chinese bag made with “imitation silk” insulation and a “waterproof” outer covering. The silver throw fits inside the orange bag to give me a combo sleep system that should take me well down into the 40°s range. Either piece can also be used individually, or in conjunction with one of my other bags to grab a few more degrees.
You can never tell what you’re going to get with the Chinese stuff, but the “imitation silk” seems to be almost the same thing as the products marketed stateside as ClimaShield… a continuous/single filament insulation that comes on a roll, and cuts and sews just like cloth. I am not going to bet on fully waterproof, but the exterior of the orange bag does bead up water enough that it rolls right off. This should be sufficient, since I’m really mostly interested in it keeping the dew off of my down bag when I don’t want to put a tarp up over my hammock.
I used the Infamous Thread Injector to sew a drawstring channel along the full width of the bottom of each bag. About 2 inches on the silver bag, and about five on the orange one. That way the foot box space on the orange bag is larger and won’t compress the down in the silver foot box. The two drawstrings can just be tied with an overhand knot to hold the footboxes together. [I also cut out the perimeter zipper on the Chinese bag]
The Costco throw came quilted into six-inch squares. I went ahead and pulled out all of the vertical stitching. This allows some of the down that was caught in the original sewing job to add to the loft. You can also now fluff the down toward the center/top of the bag so that more down will be over your body. I added vertical sewn-thru quilting to the orange bag… mostly as a “just in case” to prevent the insulation from tearing and shifting. And having the channels in the two bags at 90° opposition to each other should help keep down any cold spots.
I still have to put on a couple of snaps on each long edge to hold the pair together. Of course, in the way of all things, these are exactly what I forgot to pick up when I was at the Wallyworld down Babylon today. However, last night I just used safety pins, and then took the comboed pair out in the hammock and down into the low 50°s for a couple of hours to watch the stars come out. Worked a charm.
Specs: 38oz …78″ x 30″ … approx 2 1/2″ loft in the pair. Together, the two pack down to about the size of a gallon of milk.
A little heavier than I would really like, but the CDT only goes 15oz on its own, and I will probably be using it by itself as my go-to TQ for most of my fair weather camping. So, at a cost of under $45, and just a couple of hours work, it’s a combo that seems awfully hard to beat.
[Jus’ sayin’~~ If you have a Costco warehouse near you, and can pick up one of these throws for $19.99, you’re foolish to pass it up]