Therm-a-Rest Universal Camping Mattress Stuff Sacks provide long-lasting, water-resistant protection for your mattress. Designed to fit every mattress in the Therm-a-Rest line, these rugged stuff sacks come in a range of sizes, from 1.5-Liter to 36-Liter. Made of lightweight, durable ripstop nylon fabric, Universal Mattress Stuff Sacks include a clip loop for easy unpacking and an end handle for portability. SIZES:.7L (Orange) 6.5-Inch x 16-Inch (165 x 406 mm); FITS: Regular and Medium Trail Scout, Large Prolite Plus and 40th Anniversary mattresses.11.5L (Blue) 6.25-Inch x 23-Inch (160 x 584 mm); FITS: Regular and Medium Trail Lite and Trail Pro, other 1-2-Inch thick, 20-Inch wide mattresses.15L (Blue) 7.5-Inch x 23-Inch (191 x 584 mm); FITS:Regular Luxury Map and Basecamp, other 2-3-Inch thick, 20-Inch wide mattresses.26L (Blue) 9.0-Inch x 28.5-Inch (229 x 724 mm); FITS: Large Luxury Map, Basecamp, MondoKing, other 25-Inch wide mattresses.36L (Blue) 9.5-Inch x 34-Inch (241 x 864 mm); FITS: XL LuxuryMAP, BaseCamp, MondoKing, other 30-Inch wide mattresses.