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. RDS-certified, 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment, a box baffle construction with vertical chest baffles in the torso for reduced down movement, and a hood large enough to accommodate your favorite pillow from home. If you're looking for one of the best, most comfortable vehicle-based sleeping bags available, look no further. Features RDS-certified, 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions Includes a lightweight 20D recycled nylon shell with a non-PFAS DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort. Free-Flow+ Zip System with zipper ploughs on main zippers 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 Features: - Includes a lightweight 20D recycled polyester shell with a non-PFAS DWR finish to protect against wind and moisture and a 20D recycled polyester liner for greater comfort.