I was reading about your flight suits and they mention that they make great "diapers", but do they allow the bird to actually fly?

Flight suits  are little outfits for your bird to wear so they do not poop where they should not.

The suit does not interfere with flight.

If you do not want them to fly (away) use a leash , sold separately.

For the larger birds you may be interested in this product designed for flight . Keep in mind there’s always the possibility the bird can chomp through the line and escape.