Sea to Summit · Sleeping Bags
The Spark Sleeping Bag features a 15-degree rating, ideal for early spring and late fall alpine and cold-weather backpacking. It uses premium 850+ fill down for an excellent warmth-to-weight ratio. The ultralight 10D shell fabric reduces packed weight and size. Its tapered mummy shape minimizes dead space and enhances thermal efficiency. A draft collar and zipper guard retain warmth, while the full-length zipper allows ventilation when needed. The bag compresses to a small size for easy packing.