Sea to Summit Spark Sleeping Bag

This bag is cut wider at the hips and narrower at the shoulders to better match female anatomy. This specific shaping minimizes dead air space, which helps you heat the bag up faster and stay warmer throughout the night.

Yes, the shell is water-resistant, and the down insulation is treated to resist moisture. While it is not waterproof, it performs well in variable trail conditions and handles condensation inside a tent effectively.

Yes, the full-length zipper is designed to couple with other Spark series bags, including the unisex models. This is a great feature if you are hiking with a partner and want to share warmth.

With a 45°F temperature rating, this is a lightweight bag best suited for summer backpacking, warm-weather trips, or as a liner in colder conditions. It is optimized for weight savings rather than deep winter insulation.

It is incredibly compact, compressing down to just 3 liters. It takes up very little room in your pack, making it an excellent choice for ultralight setups where space is at a premium.