Flipping from car camping companion to ground cover is exactly what we built the Basin + Range Basecamp Double Bivy Quilt to do. One side pairs a soft poly face for car rides and couch time, while the reverse carries a PFC-Free DWR nylon shell that sits directly on wet ground. Double-wide sizing means two people share it without crowding, whether that's a tailgate lot or a blanket spread under open sky. What Our Gearhead(R) Experts Are Saying:"I flip the quilt over the second the ground looks damp, and it turns into ground cover without a tarp underneath it. The rest of the time it rides in my backseat, already unfolded before I've decided where we're stopping."