REI Garage offers the Marmot Mavericks 30 Sleeping Bag in Stone Green/Green Gulch for $48.73. Shipping adds $5.99, so it's best to pad your order over $50 to net free shipping. (In-store pickup is also available.) That's $50 off list and the lowest price we could find. It features SpiraFil high-loft synthetic insulation, a fold-down zipper, tricot-covered pillow pocket, draw cords, and a compression stuff sack.