Constructed as a single layer of medium resolution cells, the Ultra Light range gives you the lightest and smallest packed size mat without compromising on the Air Sprung Cell™ comfort.\n\nAir Sprung Cells operate in the same way as a pocket spring mattress, as each cell deforms independently the mattress conforms to your body shape which feels softer and more comfortable with more body contact area and even dispersion of pressure.The ultra-light range has a single layer of medium resolution cells to give you the lightest and smallest pack-volume mattress without compromising on Sea to Summit's Air Sprung Cell comfort.Multi-function valve integrates an inflate port with a one-way valve to prevent air loss before you seal the valve, a rapid air dump deflate port, and a fine tune button to adjust for comfort, in one compact, low profile unit.Extrusion TPU lamination is more durable, consistent and is vastly superior to roll-to-roll lamination, helping to prevent delamination.All Sea to Summit sleeping mats come with a quality stuff sack sized to suit your mat, plus a small repair kit containing six self-adhesive patches for repairing punctures in the field, and a spare silicone one-way valve flap. Sea To Summit Ultralight Sleeping Mat Large Yellow | Buy Sea To Summit Ultralight Sleeping Mat Large Yellow here | Outnorth