I have acquired another module sleep system, as pictured below. The label on the ends say the green bag is rated for 30* and the black bag is rated for -10* and layering them together gets you down -50*. I have slept in the black bag before but only down to around 18* and it did keep me nice and toasty. My plan was to strip the zipper and hood off and use it as a TQ, the foot box is already sewn in. My question to everyone is, has anyone used these in temperatures below 0*? I was wondering how accurate the temp ratings were.
gi modular sleep system.jpg
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