A $20 bill isnt even as functional!
I'd make the trade in a heartbeat! For $20 you get an item that has so many uses its crazy. I have used it a ton of times for many different purposes. Potential scenarios; stay dry, footprint for a tent, stay warm(reflective side in), stay cool(refelctive side out) or a lean to like the photo I posted. Thing is so simple and amazing at the same time.