Sea to summit Spark-18°C sleeping bag

Conquer extreme cold with the ultralight SEA TO SUMMIT Spark -18°C sleeping bag. Engineered for alpinists and winter adventurers, it offers exceptional warmth-to-weight and ultimate compressibility. Its performance-focused, contoured mummy fit minimizes heat loss, while technical shell fabrics provide weather protection. Features include a full-length zipper, expedition hood, draft collar, advanced baffle construction for consistent insulation, and an anatomically shaped footbox. Perfect for fast-and-light expeditions and winter camping where every gram and degree matters