Marmot Nanowave 35, Mummy sleeping bag, light 3 seasons sleeping bag, ideal for camping and trekkingThe mummy sleeping bag with synthetic Spirafil High Loft insulation for maximum warmth and life span of the sleeping bag; the perfect combination of heat, comfort and low weight Three season sleeping bag with anatomically optimised fit in the head and foot area guarantees better insulation and more comfort when sleeping; additional ventilation thanks to an extra zipper This 50D 100% nylon Ripstop outer material is breathable and windproof; draft