This was done like the Baby Gap pjs recon. But this was the first one and I had to rip out seams because I sewed too close to the zipper teeth.
This was the shirt. I just ripped out the side, sleeve, and shoulder seams, cut off the ribbed neck and used the largest pieces from the chest and back.
Interior was just some mid-weight cotton I had lying around. I goofed on the measurements so the exterior is slightly longer than the interior.