Free People Flannel Plaid & Chambray Denim Button Up Shirt XS

Early Free People plaid flannel & chambray denim button up shirt. Old style tag Size XS, fits loose. Frayed hem at bottom. Measurments: Bust: 40" Waist: 46" Shoulder to hem: 22" in front and 26" in back Sleeve inseam: 17 1/2". On the back under the yoke, there is a large pleat. Inside of the folds of the pleat is a small hole on each side. See photos. You cannot see these when worn at all on the outside. Not sure what it is all about. Fading and distressed looking by design.