CatLABS X 80 (4x5)

What is CatLABS X 80 film? Its a low-speed, fine grained black and white negative film designed in the spirit of Kodak Panatomic X and Polaroid Type 55 (RIP). Anyway, this is apparently not a rebranding but new formulation manufactured for CatLABS by Shanghai. Sold in boxes of 25 4x5 sheets for large format cameras.