Kelty Rambler 50F Degree Semi Rectangular Sleeping Bag - This lightweight bag is both roomy and versatile, with features the Comfort-Tuck zipper system for airing your tootsies, a semi-rectangular shape you can unzip to use like a blanket and a compression stuff sack. Features Semi-rectangle fit: spacious + compact Cozy CloudLoft synthetic insulation No-snag Comfort-Tuck zipper system Unzip completely to use as a blanket