HeatseekerT insulation offers a great warmth-to-weight ratio, is highly compressible and is extremely durable, making it ideal for cold weather. Shell is constructed of soft, ripstop nylon; polyester taffeta lining is soft next to skin. The North Face Dolomite 3S double sleeping bag includes a drawstring stuff sack. 2948 grams, 2750 grams, 2750 / 2948 grams. 61 ounces, 60 ounces, 60 / 61 ounces. 120 inches, 120 inches, 120 / 120 inches. 15 x 30 inches. Fits Up To in. 78 inches, 72 inches, 72 / 78 inches. Bought and used once. Feel free to ask questions.