Sea to summit Reactor Fleece sleeping bag

Boost your sleeping bag´s warmth by up to 32°F/18°C with the SEA TO SUMMIT Reactor Fleece. This versatile THERMOLITE® fleece liner adds significant insulation, transforming your gear for colder nights or serving as a standalone bag in warmer weather. Its anatomical mummy shape, contoured hood, and moisture-wicking fabric ensure superior comfort and thermal efficiency. Lightweight and packable, it’s the essential upgrade for adventurers seeking reliable warmth and comfort in any outdoor scenario