“Ask your daughter to put it to the test by throwing it outside and tell us what she thinks about camping with it.”

I actually put it in our 0F freezer. The foam did harden up. It felt like regular-textured play-dough. i.e., not a brick. It seems like personal pref if that’s too hard to sleep on.

“What size is it "deflated?"”

I can roll it to a 3”dia x 11”L. Laid out flat, it’s 11”x18x0.5. It can be squished flatter.

“Having just a layer of memory foam, do you think it will keep soft by head heat in (or under) your sleeping bag in summer nighttime temps in the mountains?”

Personal view: Yes; soft above 30F; firm below 30F.

-Barry