Classic RidgeRest foam mattress has been improved with patent-pending, aluminized Solar coating * 10% increase in warmth, with added durability from surface wear and tear * Solid foam with molded, closed cell fill, 0.625-inch thickness, and 2.8 R-value; made in Seattle, Washington * Size S has nine-ounce weight and measures 20 by 48 inches (W x D); size R has 14-ounce weight and measures 20 by 72 inches (W x D); size L has one-pound, three-ounce weight and measures 25 by 77 inches (W x D) * Includes limited lifetime manufacturer"s warranty