I'll attest that this is more than just a summer quilt. I had beardog make me one and I tried it the other night. It was well below 40 degrees but I was comfortable. Now granted I was wearing some pretty warm clothing to bed so YMMV but still I was impressed how much insulation value that thin quilt provides.

On a somewhat related issue I think I prefer to wear warm clothes to bed and use a light quilt rather than having a separate winter bag. I don't like the bulk of a big bag. This quilt takes up very little space in my bag and does the job if I'm wearing my warm layers to bed.

Thanks bear.