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.
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.
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.