Sea to Summits single layer UltraLightInsulated Mats provide the lightest and smallest packed size mat without compromising on comfort. When Sea to Summit was set out to design a mat that was better than what was already available, they ultimately went back to why we carry a sleeping mat into the wild in the first placeto give us a better nights sleep.Betteris of course a very subjective ambition and while people at Sea to Summit could have made the lightest, or the most compact mat ever designed, they were stoked to present what they consider to be the most comfortable sleeping mattresses available. Happy sleeping! The single layer of medium resolution cells provides the lightest and smallest packed size mat without compromising on our Air Sprung Cellcomfort. Air Sprung Cellsconform to your body shape, providing a more even dispersion of pressure across the mattress for a more comfortable nights sleep Multi-function high flow-rate valve provides fast inflate, deflate and