NWOT Cuddl Duds Flexwear dress. Scoop neck, P1X could mean Plus or Petite.

Very soft and comfortable, 88 percent polyester/ 12 percent Spandex. Perfect for office, cruise and/or spring and summer activities. Scoop neck with attached material that can be tied or not. 38 inches long from neck to hem. I am 5’3” and it hangs just below my knees.