Therm a rest / Z Lite Sol

[Deadeye]

no matter what sleep system I'm using, I carry half a z-rest (6 sections). just a few ounces, but multi-purpose: nap pad, seat, under pad for the inflatable (extra padding, warmth, and protection), emergency pad if inflatable fails, doormat for hammock...

[DownEaster]

no matter what sleep system I'm using, I carry half a z-rest (6 sections). just a few ounces, but multi-purpose ...

I used to favor that approach, with an ancient Ensolite rectangle. Then I realized that I was almost exclusively counting on it as a butt pad and those other uses basically never materialized. So I got an ultra-light butt pad (21 g/0.7 oz) for $1.99 and saved almost 3 ounces. In an emergency where my inflatable's repair kit isn't adequate I can fill a 3 mil trash bag (already carried for waterproofing my pack) with leaves, pine needles, or all my extra clothes and use that and my butt pad for cushioning.

[Time Zone]

IME, ridgerest is fine and foolproof for back and stomach sleepers. Tolerable for young side sleepers. Upon reaching middle age, it's pretty unpleasant - unless you have it in a hammock.