Thermarest neoair xlite sleeping pad description the neoair xlite mattress delivers more warmth and comfort per ounce than any other three season air mattress available our patent pending technologies deliver that performance with minimal weight and less bulk than a one liter water bottle this year new softer fabrics bring better next to skin comfort and a boost in durability all with no added weight for the discerning alpinist thru hiker or backcountry minimalist whos counting every