Timmermade - Serpentes False Bottom Sleeping Bag – Mummy

I tested the Timmermade Serpentes against the FF Tanager and found that the 20F Serpentes was both lighter (423g) and warmer than the Tanager (520g). The false bottom on the Serpentes also makes it much easier to dump heat than the Tanager. The theory behind continuous baffles sounds great but if you move a lot during the night you can forget about it; the down will migrate.

You make a good case for functionality with the 2-temp-range construction of many bags. I had not realized that was a thing. I would agree with you that pad straps are bunk. I gave up on those years ago. I tend toward quilts that have false bottoms or false bottom flaps, like [this one](https://timmermade.com/product/coati-quilt/). Curious that this same maker also does bags that are kind of a hybrid with a quilt, like [this](https://timmermade.com/product/wren-false-bottom-sleeping-bag-narrow-torso/), or even [this](https://timmermade.com/product/serpentes-false-bottom-sleeping-bag-mummy/) which take the false bottom further.

Another thing to consider is that enlightened equipment quilts are known to be a little optimistic in their temperature ratings. Their vertical baffles are also prone to down shifting and leaving dead zones. I love my enigma 20 deg but below 30 i need to start layering up or sleeping cold. The switchback is great down to about 35 for me, but most of the time if I expect colder nights I bring a pad with a higher r value. It makes a huge difference, both with a sleeping bag and a quilt, since the down underneath your body does not insulate you in a sleeping bag. My experience with sleeping bags is that if I ever roll over the bag rolls with me and the crushed down is now on top letting me get cold. I sleep much warmer in a quilt, due to tossing and turning and the quilt not moving with me, you just have to learn how to set up your pad straps properly. If you’re in the market for a new bag, you may consider Timmermade’s hybrid bags. They are a quilt with an actual bottom like a sleeping bag that just isn’t full of down. So you get the weight savings of a quilt but the draft protection of a sleeping bag. Downside is dealing with the Timmermade monthly lottery to order, but the temp ratings are also really bomber!

Timmermade Serpentes ! Love it …