For years I looked for waterproof carpeting to use on the floor of my van. This product has a fairly flexible waterproof backing that I couldn't find elsewhere for a reasonable price. It is easier to work than regular indoor-outdoor carpeting that I have previously used this way. I bought gray, but as others have noted it appears to be a fairly light blue, just slightly gray color. Double sided carpet tape barely sticks to the backing. If you use it for the purpose I bought it for, if you don;t make it slightly oversize where it fits against the sides of the van, or overlaps the door sills, it could trap water underneath and cause problems.