Marmot Trestles Sleeping Bag

SpiraFil is designed to retain its loft and thermal efficiency even when damp. Unlike down, which loses its ability to insulate when wet, this synthetic fill continues to provide warmth, making it a reliable choice for humid or unpredictable weather.

With a temperature rating of 15 degrees Fahrenheit, this bag is well-suited for fall and early winter camping. However, your personal comfort will depend on your sleeping pad's R-value and the clothing layers you wear inside the bag.

The wave construction on the top of the bag creates extra loft and traps heat more effectively than standard quilting. By combining this with a blanket-style bottom, the design maximizes thermal efficiency while keeping the bag comfortable and easy to move in.

Yes, the maximum user height for this sleeping bag is 72 inches, which is exactly 6 feet. If you are right at that height, you may find the fit snug, but it is designed to accommodate you.

The bag weighs 3.48 lbs. While it is durable and warm, it is on the heavier side compared to ultralight down bags, making it better suited for car camping or shorter backpacking trips where weight is less of a critical concern.

Yes, the bag features a locking two-way YKK zipper. This allows you to unzip the bottom portion to vent your feet if you start to overheat during the night.