01-26-2022, 05:06 PM
I agree insulating from the bottom is key. I use a twin mattress and to date I have just used a bunch of blankets layered up. I have 2 king comforters that wrap around the underside of the mattress to stay in place as a top layer. A medium layer of an opened up flat sleeping bag. Base layer is a sheet, comforter and fleece blanket. I have stayed plenty warm on really cold nights with this setup, my plan is to incorporate the new 0° xl sleeping bag i just bought as an intermediate layer to keep everything held together and seal up the sides.