It may be that you are seeing the same thing I sometimes see, which is that the canvas interfacing *beneath* the aprons is puckering because it gets creased when I sit down -- especially if I've been driving.

The crease in the interfacing causes the lighter fabric of the aprons to "pucker."



Quote Originally Posted by NeighborhoodKiltGuy View Post
These are the pictures. IMG_20190910_2222497_rewind.jpg

That is the pucker I'm referring to.