When every ounce counts, the Sea to Summit UltraLight Insulated Sleeping Mat ensures a restful night's sleep without weighing you down. This rugged sleeping mat has a 30D / 40D high-tensile nylon outer that is treated with liquid-extruded TPU lamination to keep your mat fresh 24/7. Sea to Summit's exclusive Exkin Platinum. fabric and Thermolite. HL-1 insulation provide excellent heat retention, while Air Sprung Cells. deliver impressive cushioning and support. The Sea to Summit UltraLight Insulated Sleeping Mat comes with an Airstream Pumpsack™ that doubles as a pump and a mat repair kit with everything you need to get a good night's sleep.