Never Used. -Uses: Camping -Full-length zipper with double sliders, plus wrap-around footbox zipper for versatile ventilation and ability to be opened flat and used as a quilt -ThermalQ™ Recycled insulation maintains loft with maximal compressibility -Anti-snag zipper for easy entry and exit -Comfort mummy cut efficiently maximizes warmth without constriction -Footbox follows natural foot position for comfort and thermal optimization -Micro fleece-lined stuff sack can be reversed and used as a pillow -Face gasket comfortably blocks drafts at hood opening -Single-handed draw cords adjust hood closure -Insulated draft tube with anti-snag panel prevents cold spots along zipper -Can zip together with a second bag to form a double -Offset quilt construction prevents cold spots -Thermal.Q™ Recycled -4 lb 8.2 oz / 2048 g