Mil-Tec Mummy Type Sleeping Bag 225cm Hollow Fiber 2 Layers Transportation BagThe MIL TEC mummy type sleeping bag delivers warmth and comfort in cool conditions. This sleep bag for summer also works well in spring and autumn. As a result, you stay prepared for changing outdoor temperatures. First, the mummy shape improves heat retention. The snug cut follows the body. It reduces heat loss during the night. Therefore, warmth stays trapped inside. Next, insulation boosts comfort. The double layer hollow fiber filling provides