What is PUL Fabric? So... What's polyurethane laminate - apart from a mouthful!? Polyurethane laminate is often abbreviated to PUL fabric. PUL is special... It's a waterproof AND breathable fabric! Why is this important? Well, it means if you make waterproof items of clothing your body heat has a better chance of escaping into the atmosphere! Heat escapes THROUGH the...