Three season self-inflating mattress. Thanks to a new Atmos foam type, the Prolite is lighter and more compact than ever. The 38 mm thickness makes for a big difference to traditional 2.5 cm pads. Thermarest pads have proven to be highly reliable even in professional use. Note! The product image displays the full length version, while this product is a 119 cm special version. - Size S: a good choice for people who want to minimize packing size, and choose to sleep with their legs on a backpack - Fast & Light series product, made for high-mileage and high speed journeys - R value 3.2 (best suited for three season use) - Stuff sack included - Surface material: 50D mini-hex Ripstop polyester - New WingLock valve Use is simple: upon arriving at camp, you open the valve and allow the pad to start sucking in air. After a while you can finish it off by one or two lungfuls of air, then close the valve. In the morning, just open the valve and roll the pad back to its bag. When storing at