The Therm-s-Rest ProLite 8482 Large Self Inflating Mattress is the lightest most compact self-inflating mattress from Therm-A-Rest designed for 3 season backpackers climbers and trekkers The tapered shape and use of die-cut foam means that this self-inflating mattress offers warmth and comfort while being highly compressible limiting bulk and weight The ProLite Large offers extra length and width for those who need a bit of extra room when camping The ProLite 8482 features the new Atmos foam which is exclusive to Therm-A-Rest It is a cleaner and more controlled manufacturing method that provides outstanding loft while maximising compressibility and minimising weight in order to achieve a much more uniform and comfortable mattress