Sierra Designs - Zissou 6 DriDown Sleeping Bag

There are lighter options but your comment didn’t mention the weight, just that you think it is a gimmick. However, I have owned a few of the lighter options (and significantly heavier options) and nothing has been as comfortable and draft free for me as the ZenBivy. It really is a clever sleep system.

I had a Nemo sleeping bag, a Montbell, and a Sierra Designs sleeping bag (I still own the SD bag- if I need a bag, it’s my favorite sleeping bag ever). Those were all heavier than my ZenBivy. As a lighter option, I had an Enlightened Equipment quilt. And you are right, without the sheet, the ZenBivy is essentially the same as the EE quilt. However, with the sheet, it IS very different from other quilts! It is substantially more comfortable and draft free than any other quilt. The system is every bit as good a advertised. I was skeptical… but then I bought one.

You are correct - I have not. But have you tried a ZenBivy? I admit, I have coveted a Timmermade Wren for a long time! But with the specs I want, it wouldn’t be any cheaper than my ZenBivy. And… isn‘t a false bottom quilt just as "gimmicky“ as a ZenBivy? Regardless, I have no desire to keep arguing- all I was trying to say is that the ZenBivy is a solid choice. Just like a false bottom quilt, they designed a system that addresses the short comings of a standard quilt. And it works very well.

I‘m well aware that the Timmermade is lighter than my ZenBivy. Like I said, I have coveted a Wren bag for a long time. However, it costs $200 more than I paid for the ZenBivy! Also, Michael (who started ZenBivy) is a genuine guy too. He is also selling to genuine customers (like me). I didn’t buy one because of any marketing. As I said in an earlier reply, my favorite bag (when I need a bag), is my Sierra Designs Zissou. I wanted to buy one for my son, but they no longer make that bag. Additional research led to finding out that Michael designed that bag for SD, and that he left to start ZenBivy. Which led me to their website. If you don‘t want their products, don’t buy them. But it seems like you are bashing them without even having tried one. They are a good product. Having options is a good thing for our hobby.

Sierra Designs has or had one recently. I tried it out but didn't like it much and ended up going with a Zenbivy which is exactly what I hoped it would be.

I also got an EE quilt and have thoughts on rating - I opted for a 0° bag but this was motivated by spending some uncomfortable nights right around 35° in my Sierra Designs down bag that was rated at that. With a quilt the zero seems overkill but the design has meant I've been comfortable in much warmer temps despite being a warm sleeper generally. I can open it up, hang a leg or arm out, or be just partially covered. They key with the quilt style is having a pad that is matched for the temps you're in. On my last trip i still took my Sierra Designs bag as it packs slightly smaller than my ee quilt but this setup works for me to cover a wide range of temps. Admittedly I missed the mobility of the quilt compared to the mummy but I've spent most of the last 30 years in mummy bags so it's not unfamiliar.

I have a Sierra Designs sleeping bag that has an actual foot flap that allows you to have your feet out of the bag while your body is still in the bag. It’s great. Highly recommend.