Last Sunday I tried out the tube cocoon again. Outside temperature saw a low of 34* at 6 am. Inside the cocoon it was 55*. After moving around a bit, the temp inside the cocoon rose to 61* (within 5 minutes of the 55* reading). My side "window" was too big this time (I had trouble blocking the cold air coming in)....so next time I'll decrease its size by pulling the top half of the cocoon down some more and using some duct tape to keep it in place.
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