ALPS MOUNTAINEERING COBALT SPRING +25°

The ALPS Mountaineering Cobalt Spring +25°F is a technical, mummy-style sleeping bag engineered for dedicated backpackers, cold-weather hikers, and mountaineering enthusiasts who require a perfect balance of high-efficiency thermal regulation, lightweight portability, and compact packability. By combining a heat-trapping, tapered mummy silhouette with advanced synthetic insulation, this bag organizes your overnight recovery into a warm, streamlined, and highly reliable system built for navigating variable spring or autumn conditions without the excessive weight, bulk, or heat loss found in rectangular leisure bags.

Key Features:

• Advanced Thermal Mummy Geometry: Engineered with a precision-tapered shape that minimizes dead air space around the body, the bag maximizes heat retention and efficiency, ensuring you stay warm even when temperatures drop toward its +25°F comfort rating.
• High-Performance Insulation: Designed with premium, moisture-resistant synthetic fill, the bag maintains its loft and warming capability even in damp, humid environments, providing a dependable thermal barrier that outperforms traditional down in wet-weather scenarios.
• Weight-Optimized Construction: Crafted with lightweight, durable fabrics, the bag offers a superior warmth-to-weight ratio, allowing you to carry essential thermal protection deep into the backcountry without compromising your overall pack load or agility.
• Technical Comfort & Closure: Featuring a contoured hood with a draft collar and an insulated zipper baffle, the bag seals in warmth and prevents cold spots, while the snag-free zipper system allows for quick and reliable entry and exit during cold-weather excursions.