Drymate GMC3058 Extra-Large 30-by-58-Inch Gas-Grill Mat Grill mat protects decks and patios from moisture and grease damage Absorbent non-woven fabric fiber with bonded, non-slip waterproof backing Patented Zorb-Tech anti-flow technology prevents soak-through Made from over 50-percent recycled materials; machine-washable Measures 30 by 58 by 1/2 inches