Andy--It is a Photoflex changing tent/bag originally sold by Calumet. It hasn't been used in a while...I stuck my head inside yesterday to check for any light leaks...didn't see any...seems still pretty light tight. It has a pretty spacious interior, but it takes a little while to figure out how to expand it and set it up...kind of like setting up a camping tent. The only thing I dislike about it is that some of the underside of the exterior layer has started to shed little flakes, kind of like a vinyl dandruff, much like a tent or backpack material will do after about 10-12 years. Otherwise it is intact, unpunctured, light-tight and still comes with the original zip-up bag. I'll attach a photo or two. Let me know if you are interested.
-Stephen Bybeephotoflex2.jpg