Rated to 30 degrees Fahrenheit, the regular-sized Eureka Copper River mummy-style sleeping bag features a bag-within-a-bag design, which keeps cold air from the outside from getting through and warm air on the inside of the bag from escaping. The inner layer of the bag is cut smaller than the outer layer to create a consistent thickness of insulation throughout the bag, which prevent thermal leaks from forming. The trapezoidal foot section is angled to allow for the foot's natural sleeping position. It has a fully adjustable contoured hood. Other features include a two-way, self-repairing zipper, inside stash pocket, fleece pillow pocket, zipper thermometer and compression stuff sack.This sleeping bag is filled with Eureka's proprietary 7-hole slickened, polyester Thermashield fiber fill, which provides maximum insulation at the best value possible. Each Thermashield fiber strand contains 7 tunnel-like holes that run the length of the strand. Each of these holes traps air inside it's passageway creating dead air space that efficiently retains heat to keep you warm.

Mummy-style sleeping bag rated to 15 degrees F

Trapezoid-contoured foot box that won't constrict your feet

Filled with 3.3 pounds of Thermashield fiber fill; 4.5-pound carry weight

Regular measures: 84 by 32 by 20 inches, Long measures: 90 by 34 by 20 inches

Inside stash pocket, fleece pillow pocket, zipper thermometer; includes compression stuff sack