The Eureka Sandstone 45F is a rectangular sleeping bag rated to 45 degrees Fahrenheit. It is a comfortable and moderately warm bag; perfect for camping. The inside of this bag has a slightly fuzzy peached polyester lining for a soft and warm feel. The dimensions of the bag are a roomy 76 by 34 inches. It weighs 3 pounds and 2 ounces and is 10 by 17.5 inches when inside the stuff sack. The construction of this bag has double-layer insulation for excellent loft and durability.