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U.L. Super Stretch Down Hugger sleeping bags use high quality goose down, patented construction techniques, and ultralight materials, to reduce weight while maximizinge efficiency and compressibility.Super Stretch SystemMontBell's patented Super Stretch System uses horizontal elastic stitching to draw the insulation closer fit to your body and keep heat in the bag - where it belongs. This stops drafts, eliminates cold spots and improves the bag's thermal efficiency by reducing the volume of air |
