A "C0 water resistant" compound refers to a water repellent treatment for fabrics that is completely free of perfluorinated chemicals (PFCs), meaning it contains "zero carbon" with fluorine attached, making it a more environmentally friendly option compared to traditional water repellent treatments that often use harmful PFCs; essentially, "C0" signifies a PFC-free water resistant coating.
Love your videos - they are clear and informative. Would you consider going more into depth on clothing materials. I read an article that was talking about how a lot of man made materials like polyester and rayon are bad but would love to better understand. Like should I stick to 100% cotton for kids?