It is a multiple choice poll. The basic system is one space blanket covering one HH OCF pad inside the under cover. I have used the basic system several times in the 30s and 40s and have been just fine, with no significant condensation. By augmenting with everything from unworn clothing, or Garlington Insulators, I have been warm well below 20F even with no tarp in wind chills of about 6F. I find the extra wind/rain/snow protection of the UC to be a major plus, even allowing the use of smaller, lighter tarps with no loss of wind protection.
For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us....that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. For we know that the whole creation groans and suffers the pains of childbirth together until now.