These are ideal for those in the armed forces and anyone looking for subtle coloured kit thanks to the non reflective fabric. Made from durable 70 Denier PU-coated Taffeta Nylon, making them hard wearing and shower proof. We wouldn't immerse them in river for any length of time, but it will keep rain out all day long. The waterproof coating can be replaced with products like Nikwax to extend the life of the bags.