Slumberjack Forest 0 Degree Sleeping Bag Stuffed with an extra helping of our slumberloft synthetic insulation and equipped with a zipper draft tube Anti-snag zipper protection Draft tube along zipper keeps out cold air and prevents heat loss Durable construction ensures stable insulation over Time Zip together feature allows two same-size rectangular bags to be joined to make a double-wide Temp Rating : 0F/ -18C Insulation : Slumber loft Carry Weight: 5 lbs 7 oz Fits up 6 feet Rectangle Shape Temp Rating : 20F , -18C Insulation : Slumber loft Carry Weight: 5 pounds, 7 ounces Fits up 6 feet Rectangle Shape