Hm I discovered insulated air mattresses and they have a 9-11 R value. I might go with these and not the Coleman my cot came with https://www.amazon.com/Hikenture-Inflating-Sleeping-Inflatable-Insulated/dp/B09GJW6N4X/ref=sr_1_1?crid=22VV22K2R1H5T&keywords=insulated%2Bair%2Bmattress&qid=1681300802&sprefix=insulated%2Bair%2Bmattress%2Caps%2C116&sr=8-1&th=1

The Klymit Thermoreactor only has an R value of 4