The NeoAir Topo Luxe brings the line of NeoAir mattresses to new heights. A whopping 4 inches (10 cm) thick, the Topo Luxe is Thermarests thickest backpacking NeoAir ever. The Topo Luxe packs down small before inflating for plush support and warmth thanks to the Triangular Core Matrix, the best warmth-to-weight construction for air pads. The Topo Luxe also features the high-performance TwinLock valve with two dedicated valves for lightning-fast inflation or deflation. NeoAir Topo Luxe L Sleeping Mat