NANGA presents this hooded envelope series. Available for 1 or 2 persons, all models have draft tubes to prevent cold air from entering through the zipper side. The upper part is a lightweight down with high heat retention, and the bottom part of this product is made of synthetic cotton (single quilt structure) that flattens depending on your weight. This series is not only great for camping and outdoor festivals, but also for sleeping in the house or car.