NEMO’s newest sleeping bag silhouette is now offered with aerospace-grade, recycled synthetic insulation for ultralight adventures in any climate. Inspired by the traditional tapered mummy bag, Soul has a sleek, streamlined shape that shaves excess material and weight wherever possible but still sneaks in plenty of comfort features. This trim backcountry bag also meets our Endless Promise® standard and can be sent back to NEMO for recycling at the end of its life. Soul’s single, asymmetrical front zip integrates with our innovative Headwall™ internal draft guard to provide 360-degree protection. A plush, insulated collar, Headwall wraps around the back of the neck and cozily overlaps itself in front to efficiently block cold air while creating a uniquely comfortable experience. Balancing the front zipper is a single Thermo Gill™ vent, enabling fine-tuned temperature control. With both internal and external zippers, the Thermo Gill incrementally releases body heat without direct exposure to the cold, extending the usable temperature range of the bag. For additional instant ventilation (or simply to let your feet poke out), the footbox also features a zippered opening. Highlighting the clean design are strategically placed vertical and horizontal baffles to optimize warmth and comfort while preventing migration of the Zerofiber™ 800 synthetic insulation. A unisex bag, Soul calls out both the Limit temperature rating and the Comfort temperature rating in its name. Per industry standards, the Limit rating (the first number referenced in the series) is considered the benchmark for men, while the Comfort rating (the second number referenced in the series) is considered most applicable to women. For a complete explanation of how to interpret these numbers, read our blog here.