The sure fit stretch Morgan one piece Wing Chair furniture cover in Gray has an elastic seat seam in conjunction with seat pleat to help hold seat area in place. The elastic at the base of the furniture cover allows the cover to stay snug to the base of your furniture. The elastic is free-floating inside the hem of the cover to allow you to adjust fullness around the perimeter of your furniture. Versatile design allows for both square and box cushions. Arm front relaxes at 8and will cover narrow arms and extend or stretch to cover up to 14Arm widths.