I started by sewing up my Daddy Flat as usual. Then I cut two pieces (1.5x1.5 inches) of touchtape hook, and four pieces (same size) of loop fabric. I also cut a 5 1/4 x 2 inches piece of loop fabric for the tummy panel. I choose loop fabric for the loop side because it is so much softer and more flexible than touchtape. You can only find this fabric through diaper suppliers. Touchtape could also be used. The loop fabric on top of the tab will allow the wing to cross-over if necessary.
After experimentation I found that my machine sewed the two layers together more neatly if I sewed with the hook tape facing upwards. I usually stitch 1/8" from the edges. I then sewed the other two 1.5" pieces of loop fabric beside the tabs, on the inside of the diaper, about 1/4" away. The only purpose of these tabs are to fold the wings over onto for washing. They are called laundry tabs and are meant to keep the hook part of the Velcro from grabbing and ruining things in the wash.
Beware: If you let your little one run around without a cover at home, the Velcro closure is definitely more likely to be undone by your little one!
If you aren't familiar with Daddy Flats, click on the link above for more information about this great pattern and see my other blog posts about sewing Daddy Flats!