Bag Expander

Western Mountaineering Bag Expander – Down Sleeping Bag Expander for Mummy Bags Increase the comfort and versatility of your sleeping system with the Western Mountaineering Bag Expander , a down sleeping bag expander for mummy bags . Whether you need extra space for broad shoulders, want more elbow room, or plan to share your bag with a partner, this simple addition transforms your sleeping bag into a roomier, more adaptable shelter for the night. Designed to zip directly into any Western Mountaineering mummy-style sleeping bag , the expander adds width without compromising warmth. Like our premium sleeping bags, it’s insulated with 850+ fill power ethically sourced goose down for the highest warmth-to-weight ratio. This means you get additional interior space while maintaining the exce...