Dual layer, offset stitch construction helps to eliminate heat loss at the seams Two sided zipper guards prevent snags; two-way zipper allows you to unzip the bag from the bottom up to allow increased airflow Measures 90 inches long by 39 inches wide; rolls to 17 inches tall by 13 inches in diameter (uncompressed) Features SuperLoft Elite 4-channel hollow fiber insulation Other features include shoulder and zipper baffles, an adjustable mummy hood, and an interior storage pocket