These colorful liners provide a firm base so that you may put smaller objects on a wire shelf. Brighten your room with a choice of seven colors! The shelf liners are sold in varying quantities (packs) so you can mix and match colors. The product is made from durable 1/8" thick flexible, moisture resistant PVC and can be easily cleaned with a damp cloth. Holds up to 300 lbs of evenly distributed weight.