I put my BA insulated air core on top of my blue foam just because I am afraid of puncturing the darn thing. I paid $70 for it and do not want a hole. Of course, I am rarely below 0F. The neo is even more expensive. I wonder if I would be brave enough to even take it out and sleep on it, if I had one.
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I've taken a vow of poverty. To annoy me, send money.