MATERIAL: * PVC (poly vinyl chloride) closed cell sponge with urethane coating.APPEARANCE: * Edges: Beveled on 4 sides.CLEANING INSTRUCTIONS: * Only use sponge mop to clean. Do not use hot water or bleach. * Grease: Remove with a non butane degreaser.USAGE: * Recommended for dry locations only, will absorb liquids. * Stools, high heels and sharp instruments will make holes. * Can be cut with a utility knife.