Overfill Option – Extra Warmth and Long-Term Loft Retention

The Overfill option allows you to add extra down throughout your fully baffled sleeping bag, increasing warmth by approximately 5°F. In addition to providing extra insulation, an overfill helps maintain loft over extended use. Over time, down can compress due to moisture, dirt, and body oils, reducing its effectiveness. Adding extra down helps counteract this by improving long-term performance and durability.

Each sleeping bag has a pre-determined overfill amount, so be sure to select the correct option from the list when ordering. Please note that overfilled bags are not eligible for returns or exchanges, as this is a custom modification.

*This product is an add-on to a Western Mountaineering sleeping bag, and cannot be purchased on it's own.

Please note: The Great Divide Trail discount does not apply to this item.