I purchased a wiggys antarctic hunter -60 deg sleeping bag for hunting this year. I used it in a tent with a cot and a Klymit static v insulated pad. On the first trip temps got down to single digits and one night I got cold and put my thermals on and was fine from then on. On the next trip we hit the trail head late in the night and it was -12. We slept in the fifth wheel portion of the horse trailer. I put 1'' thick wool horse pads underneath my Klymit pad for additional insulation. I was afraid it was still going to be too cold so I wore heavy weight fleece thermals, fleece lined pants, sweatshirt, and a knit wool cap. It was an extremely cold night and the bag did not keep me warm! Now I did not really expect this bag would be good to -60, but I was hoping it would do -20 to -30 and I don't think there is anyway it would be comfortable in those temps. I emailed Jerry at wiggy's yesterday asking him about this bag. He was quite rude over the emails blaming my sleeping pad for the cold. He said that "they were full of it" to the screenshot I sent him of the description of my pad and the insulation inside. He then told me "Let one of them use the pad with you one day". Overall to begin with I was quite happy with the bag it seemed a lot more durable than many other sleeping bags out there and stuffs down into a relatively small size considering the size of the bag. Down to 0 it performed well but beyond that it is not enough. Wiggy's -60 rating is grossly overestimated and his customer service was some of the worst I have experienced. I will be keeping this bag as it doesn't look like he will take it back but I would not by another product from him.