Waterproof * Heavy Weight Vinyl * Brushed Silk Finish * Treated with Ultra-Fresh an antimicrobial which inhibits the growth of mold mildew fungi and order casuing bacteria * Fire Retardant * Will not crack to -15F * Zippered covers have rust-proof polyester zippers * Notice to California Consumers: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm *