Last year Therm-a-Rest took their best selling ultralight air mattress and added a SpeedValve to it to offer you the Therm-a-Rest NeoAir 8482 XLite 8482 Max SV Air Mattress This three-season mattress still offers you more warmth than any other three-season mattress but now it is quicker and easier to inflate due to the way that the SpeedValve pulls in surrounding air to amplify your breath to inflate and deflate the mattress in half the time of a traditional air valve The new valve and more rectangular shape of this mat does add a little bit of weight to this mat but not much at all which means this high performance mat is still amazingly compact and ultralight making it ideal for backpackers hikers climbers and explorers This 3 season Therm-a-Rest mat has ThermaCapture 8482 reflective layers and a Triangular Core Matrix 8482 construction to minimise heat loss and to offer astounding warmth and an unrivalled level of stability and comfort so you can get your sleeping mat inflated quickly and easily so you can get a much needed restful night s sleep