Sleeping Bag Overfill

Sleeping Bag Overfill – Extra Down Insulation for Western Mountaineering Bags Boost your sleeping bag’s performance with the Sleeping Bag Overfill , an optional upgrade that adds extra 850+ fill power ethically sourced goose down throughout your bag’s fully baffled chambers. This custom modification increases warmth by approximately 5°F , making it ideal for colder conditions, high-altitude trips, or anyone who simply prefers a warmer night’s sleep. In addition to the immediate warmth boost, an overfill helps maintain long-term loft retention . Over time, even the highest quality down can l...