This is finely meshed pattern, arrived in a darker brown than pictured, but it is under a rug so it does not matter. I think the thicker square grid pad is for the thicker rug and I hope this will be good for the viscose rug on hardwood. It states that it is not for use with acrylic, vinyl and porous surfaces. I used this type of pad on top of carpet, it did not keep the rug still.