Eureka Cimarron 15 Degree Mummy Sleeping Bag Eureka!'s ThermaShield insulation blends solid and hollow core polyester stable fibers to ensure excellent warmth, while maintaining loft and durability. The warm-to-the-touch peached polyester lining combines the performance of synthetic fabric with the soft feel of cotton. An anatomically designed trapezoidal foot box keeps you comfortable by letting your feet rest in their natural position. Cozy up with Eureka!'s buddy system, which mates with women's and long-length (left-side zipper), mummy-style sleeping bags for all-night warmth. Includes four-way compression stuff sack. Fits up to 6 feet tall; temperature rating of 15 degrees Fahrenheit; weighs 4 pounds 1 ounce. Limited lifetime warranty. The Eureka! brand began in 1895 with rugged canvas wagon covers to custom camp tents. Eureka! later made history as the tents used by the first all American Mt. Everest expedition explorers. Today, the brand manufactures tents, sleeping bags, and more.