Not sure if it's the same deal-- when I bought my irregular NeoAir Xtherm regular, it was $113.97 (for size "regular"). ($189.95 currently on Amazon). Now the Xtherm seems to be $189.95 for size regular. However, the Xlite in large ($105.97) or women's regular ($95.97) seem to be on sale, again as irregular stock. (Amazon $159.95 & $159.95).
So periodically Campmor must collect a group of items that Thermarest has deemed irregular and put them up for sale.
Actually, the women's size seems like a kind of useful size--at 20 x 66, 12 oz, it's in between the small 20 x 47, 8 oz, and the regular, 20 x 72, also 12 oz. The note on Campmor says that "Women's XLite uses additional reflective barriers for greater warmth," though the claimed R value, 3.2, is the same.
I called Thermarest, and they said that, in fact, the R value on the women's is 3.9.
So have ordered a women's. Good deal on something that might be perfect when the ground is a little colder, but you don't want to carry an Xtherm.