If you know you know. The ultimate change mat. Since Sew What I Sew permanently closed this is likely one of your last opportunities to grab one of these. "The Filthy Taco is a change mat, duffle and laundry bag all rolled into one. A circle of vulcanized rubber with a zipper running around the periphery. Open it up, lay it alongside your vehicle and pull out the integrated changing screen (complete with magnets to hold the top of the screen in place against your car door). Wriggle into your wetsuit or cycling kit in relative privacy. Reverse the process and wet, grimy gear falls onto the mat, where it can be zipped up and brought home. It's simply brilliant."