Heavy-Duty Rubber Anti-Fatigue Mats are ideal for dry work areas and places where chemicals are present. Virtually indestructible. 100% pure rubber matting protects floors, equipment, reduces fatigue. Vinyl sponge construction. 3/4" thick. Non-porous, nonskid, long wearing, textured surface with solid underside. 35% softer than concrete; does not stretch. Reduces sound levels. Absolutely waterproof. Made in USA.