This is our 42g/m2 Nylon 20D 28 C PU Thermochromic PFC-Free Waterproof Dyed Fabric. (Styles #1 and #4 feature a Ribstop weave; styles #2, #3, #5, #6 feature a plain weave.)It is a 100% nylon dyed fabric, weighing 42g/m2, with a width of 55/56 inches. The main processes involved are "Thermochromic Color Change + PFC-Free Waterproof Treatment". The article number is DB10218.This fabric offers a soft and comfortable handfeel with a smooth, leather-like finish. It is PFC-free waterproof and environmentally friendly. As a PU thermochromic fabric, it changes color above 28 C, with the color change effect becoming more pronounced at higher temperatures!