Iv'e been using a North Face 40 deg. rectangular sleeping bag as an UQ for the past year. Coupled with a wool blanket between the layers of my WB double and a synthetic -35 deg sleeping bag, I comfortably hung at -10 deg. F this winter. Hoping a Singer 15-91 threadinjector is still at the local thrift store. If it is, will buy it today and properly modify the NF into an official UQ. Wish me luck. The Power Of Wool
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