Quilt users: At what temp do you switch to a mummy bag?

[MG08]

Hello everyone and may this year be the best ever for all of us.

At about what temperature do experienced quilt users switch to a mummy bag? I've used a WM Kodiak with 4 oz overfill (direct from WM) for 0-25 degrees for a few years and always slept warm and comfortable (XTherm max, always in winter). But now past age 65 I want more wiggle room.

I'm looking at a Katabatic Flex 5 (or Flex 15 with 2 oz overfill) but I can't help thinking that temps below 20 really need a mummy bag for warm, restful (key word) sleep. I'd use Katabatic's Crestone down hood or Goosefeet Gear's down hood (not sure which yet). But ... I'm absolutely not willing to consider any other quilt than Katabatic, even at their prices (having seen and handled a Flex in person already)

Here's my issue: I'd feel awfully foolish if halfway through the first 10 degree night I kept telling myself, "I knew I shoulda stuck with the Kodiak! What the heck was I thinking!"

Appreciate all relevant experience and suggestions.

 

[sndmn11]

Teens. I have a Kodiak and whatever the lower rating Western .mountaineering quilt is. Astralite?

 

[ianpadron]

If I see temps in the teens I'm rocking the mummy bag. My 5 degree WM bag is significantly warmer than my 0 degree EE quilt. I'd be comfortable taking the 5 down into the negatives, quilt got chilly around 15 or so. I'm a hot sleeper and only wear baselayers...but needed a puffy on the night I decided the quilt wasn't the right tool.

I've used a quilt 90% of the last decade so know all about how to maximize their efficiency, no user error when I was cold (pad, sizing, sleep clothes, draft control, etc )

 

[justinspicher]

I switched from a quilt to a bag when I found out about the Sierra Designs backcountry bed. It’s a combo of both. I use it exclusively now if I’m staying out overnight. I went with a bigger/longer size so that I could layer inside of it.

 

[MG08]

Thanks sndmn11.

 

[MG08]

If I see temps in the teens I'm rocking the mummy bag. My 5 degree WM bag is significantly warmer than my 0 degree EE quilt. I'd be comfortable taking the 5 down into the negatives, quilt got chilly around 15 or so. I'm a hot sleeper and only wear baselayers...but needed a puffy on the night I decided the quilt wasn't the right tool.

I've used a quilt 90% of the last decade so know all about how to maximize their efficiency, no user error when I was cold (pad, sizing, sleep clothes, draft control, etc )

Ian;

What do you use for head gear in the quilt when it's cold, and do you think the attached hood on the WM bag is what makes the bag warmer than the quilt with separate head gear (down hood, merino balaclava, etc)?

Thanks.

 

[ianpadron]

Ian;

What do you use for head gear in the quilt when it's cold, and do you think the attached hood on the WM bag is what makes the bag warmer than the quilt with separate head gear (down hood, merino balaclava, etc)?

Thanks.

I typically wear a beanie and fleece neck gaiter if it's really cold. I don't think it's the lack of hood as my core and legs get chilled before my noggin.

When really cold in the quilt I typically have it pulled entirely over my head aside from a small hole to breathe. I'm a side sleeper and the bag is extra long, extra wide fwiw.