THERMAREST NeoAir XLite   - this ultralight three season sleeping pad from Thermarest is one of the most popular ultralight sleeping pad on the market for its good weight to performance ratio.
This pad wins more awards and is Top Pick Award for Ultralight by OutdoorGearLab, because for 340g you won't have to sacrifice a thing when it comes to comfort and packed size. 
This pad is warm enough for use in most summer, spring, and fall conditions and we think is one of the most versatile three-season pads on the market. 

Available in several sizes, including a roomy regular wide, the XLite features the high-performance WingLock valve, allowing the pad to inflate three times faster thanks to a larger opening and one-way inflation. Like all Therm-a-Rest pads, the NeoAir XLite is made in market to ensure quality and minimize environmental impact. The pad includes a breath-saving pump sack, compact stuff sack and field repair kit.

Thermarest says:

"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. 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 who's counting every ounce, there is simply no better choice to assure the kind of rest you need to enjoy tomorrow."

CHARACTERISTIC