Waterhog Classic Door Mat, 3x4, 17 colors,Ships for $2.99 Choose Waterhog Color: Charcoal Ships for $2.99 Cleated backing to minimize movement on all surfaces. Exclusive "water dam" that allows the Waterhog mat to hold up to 1 1/2 gallons of water per square y Easy cleaning! Simply hose Waterhog off with water and hang to dry. Anti-Static for use indoors or out.