Wind Hard Tiny Pro 10D 800FP Down Sleeping Bag Quilt

I would get a quilt instead of a 3 season bag; they’re lighter, more versatile and pack smaller. I have a Hyberg Slumber 400 and I love it, used it down to around 0c and kept warm. The Aegismax Wind Hard from aliexpress is amazing value if you’re on a tighter budget.

I find it much easier to regulate temperature with a quilt than a sleeping bag. If it’s cold, you can attach it to your mat with straps, but I just tuck the edges under my legs as I sleep on my back. The ability to kick a leg out and not having to faff around with zips is amazing. Mine has a closed footbox. An openable foot box doesn’t seal perfectly so often lets some cold air in. A closed footbox is also lighter. If you’re an active sleeper, definitely get a wide quilt.

I was able to push a wind hart tiny pro quilt from AliExpress down to -6 Celsius when wearing all of my layers. Might be a good option if you are open to using a quilt

In that price range I’d go with a quilt from aegis max or ice flame. Not as high quality as more expensive options but i think will offer the best bang for your buck in terms of down. I have used a kelty cosmic 20 car camping and it was not even warm to 30 degrees F (-1 C). It’s also quite heavy and bulky.

I actually quite like my aegismax. Decent enough, it frequently goes inside a 20° quilt to buy me comfort down to 0°F

I have these insanely tiny down sleeping bags from Ali Express. I typically use them as a second bag when cold weather camping but have used them when staying at airbnb etc.