Naturehike Ultralight Mummy Standard R 3.5 CNH22DZ018-GREEN Ultralight hiking air mattress. Key features of the Naturehike mattress: ideal from spring to autumn; insulation coefficient 3.5; three-layer construction; thickness 7 cm; lightweight and compact; bag and inflation bag included; double valve; The Ultralight Mummy Standard R 3.5 mattress is an excellent choice for outdoor trips from spring to autumn, when temperatures can occasionally drop below freezing. Thanks to its three-layer construction, it offers excellent insulation from the ground, and its thickness ensures a comfortable sleep. When folded, it is compact, making it easy to transport even in a small backpack or bicycle bag. The three-layer construction of the mattress effectively protects against cold and ground moisture. Made of durable 20D Nylon with a TPU coating, it has an R-Value of 3.5, making it suitable for use even in slightly below-zero temperatures. The mattress is thick and comfortable, and its square chambers prevent sagging and distribute weight evenly. Its mummy shape conforms to the contours of the body. The mattress is inflated via a double valve, which allows for air inlet and outlet adjustments, preventing air from escaping during inflation and from being sucked back in during deflation. The set includes an inflation bag for easy inflation and a storage bag for folded storage.