Versa 2R Mat

I’ve winter camped in plenty cold weather with a 3R plus a 2R foam pad underneath and been plenty warm just because I don’t like having a dedicated winter pad.

Modern-day insulated inflatable hiking pads are 3 to 4" thick and the comfiest are miles better than anything I've seen any military force use. Reliable brands include Thermarest, Exped and Sea to Summit, with the latter having an "air sprung cell" structure I find the comfiest of them all. Model names include Neoair for Thermarest, Versa for Exped, and Etherlight and Aircell for Sea to Summit. Add an inflatable pillow and you're set for an actual night of sleep instead of just waiting for time to pass. Some bag manufacturers make wide or extra wide models. I'm not as well updated on bags.