Deluxe, upgraded version of the original Therm-a-Rest self-inflating mattress, a bestseller for over 35 years * High-loft expanded foam core lightens the load, makes it more compressible, and offers exceptional warmth and comfort * Two-inch thickness and an R-value of 5; made in Seattle, Washington * Size R has two-pound, nine-ounce weight and measures 20 by 72 inches (W x D); size L has three-pound, eight-ounce weight and measures 25 by 77 inches (W x D); size XL has four-pound weight and measures 30 by 77 inches (W x D) * Includes limited lifetime manufacturer"s warranty