Most waterproof poly cloth diapers are marketed as being made with PUL. However, some diapers are described as being made from "TPU," which gives the impression that TPU is a completely different fabric. In fact, TPU is not a fabric at all. Let me explain because I was pretty confused until I spent way too much time last week doing some research. Here's what I learned. TPU is Not Really a Fabric First of all, here's what the acronyms stand for: PUL is Polyurethane Laminate TPU is Continue Reading