MIL-TEC Sleeping Bag U.S. Modular Split Inner Outside Sleeping Bags OliveThe MIL TEC U. S. Modular Sleeping Bag delivers flexibility for changing weather. This Modular Sleeping Bag adapts from summer nights to deep winter cold. As a result, you tailor warmth to the mission or trip. First, the system offers two layers. You use the inner bag alone in mild conditions. You use the outer bag for cooler nights. Then, you combine both for extreme cold. Therefore, one system replaces several sleeping bags. Next, materials support