TETON Mammoth Cotton Sleeping Bag Liner

For years I have gone camping with sleeping bags and sometimes accompanying liners that promise to keep you warm at 20 deg F or 0 deg F, only to find I am still cold and miserable at 40 deg F. And if my sleep is ruined, then so is my trip. I finally decided to do some research and came across the Deer Hunter sleeping bags offered by Teton Sports which carry a -35 deg F survival rating, and which I have tested myself down to -20 deg F. In addition, I wanted one or two liners both for my future trip to Alaska and also as an aid, if I want to sleep with the Deer Hunter more open and just use a liner. (say, on an early fall night here in Central CA, when the temps only drop to 55 deg F) I decided to order one synthetic liner from Teton and also this model, their cotton bag liner. Typically, a synthetic liner will give you an extra 10 deg F or so, of warmth. So that a bag with a comfort rating of 40 deg F and a survival rating of 15 deg F can now be used in comfort on a 30 deg F night or for survival on a 5 deg F night. A cotton liner is just a tad bit warmer and instead of 10 deg F more protection, offers typically about 12 to 15 deg F more warmth. And that is exactly what I found with this liner. I have now used this Teton cotton liner on three occasions here in California during the summer and early fall and found it is great to pair with my Deer Hunter bag when I do not want the top of the bag to cover me. (I always sleep with a lightweight cot that keeps me about eight inches off the ground and with a closed cell foam sleeping pad on top of the cot and under my bag) This liner hits that sweet spot on evenings when the temps drop to about 65 to 55 deg F and you want something light. And I am sure this will give me an extra layer of warmth if I get up to Alaska. I also like the construction of the liner, the drawstring and the included carrying bag. The cotton used seems to be a good weave and so far, I have not had problems with it holding in sweat. When you combine those positives with a reasonable price of $29, then in my book you have a five star item. Happy customer so far.