This is a newer, lighter version of the original Thermarest NeoAir. This newer design has rounded corners and a tapered shape which is probably where most of the weight savings come from.
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Weight is 213g (compared to 255g for the first generation version). Stuff sack weighs 11g. It also comes with a repair kit consisting of some alcohol wipes and repair patches.
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Being tapered, this version will probably work better inside a bivvy sack ( like the SOL escape bivvy ).
I got my NeoAir XLite off Amazon - Thermarest NeoAir Xlite Sleeping Pad.
Warmer options than they XLite are the women's Xlite which has an extra layer of reflective heat shielding inside or the slightly heavier Neo-Air Xtherm.