When the neckline gets worn or even pulls apart you can repair it

1. Hand sew the two pieces back together.

Sew together any holes on the top.

2. Pull the two pieces apart and pull down the inside piece to cover the seam.

Pull down 1/4" and stitch to seam.

3. Stitch the inside piece to the seam.

4.Wash garment.

See the worn line on the inside of the shirt?

The worn faded part is now inside about ¼” below the top.

You can do the same thing with the sleeves if they get worn.