The Basecamp takes vehicle-based camping to the next level. This version of the Free-Flow Zip system allows you to open either side of the bag or the footbox for the greatest ventilation possible. With a relaxed semi-rectangular fit, for even more space you can zip two Basecamp sleeping bags together as a double, or unzip the upper section for use as a quilt. SUSTAINABILITY 20D Recycled nylon shell with a non-PFC DWR finish to protect against wind and moisture DESIGN & DETAILS: Versatile and spacious, the Basecamp sleeping bag brings comfort, performance and ventilation to the world of vehicle-based camping RDS-certified, 650+ fillpower duck down with a non-PFC Ultra-Dry Down treatment to stay drier in damp conditions Includes a lightweight 20D recycled nylon shell with a non-PFC DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort Free-flow+ zip system provides excellent temperature regulation and multiple sleeping bag configurations Oversized hood with adjustment cords has space for your favorite pillow from home Sea to Summit Guarantee is offered for the Lifetime of this product TECHNOLOGY: Ultra-Dry Down(TM) uses a non-PFC hydrophobic treatment to ensure it absorbs less moisture and dries more quickly