It's about $40 for 300 feet, is about as thin as it can possible be and has no anti-halation layer of any kind. It is on a polyester backing, which means it's super thin; I can fit 60 or more exposures in a film cartridge. The feeling I get is that some guy in Germany coats this stuff in his basement.
It's an ISO 50 film, but I'm pushing it to 400 and souping in Dektol. It produces almost zero fog @ 400 and the base is almost clear, but it won't develop past 400; I can leave it in the developer for 10 minutes or 20 minutes and it makes no difference.