son gave me a gen-u-wine Army ACU boonie hat. Very handy, and wore it a lot to keep the sun out of my eyes(and sometimes the rain). Until Security Staff(Jr.) got hold of it and chewed a big damn hole in it.
While here on leave at Christmas he gave me a worn-out ACU cap. I cut a suitable piece out, used some wash-out fabric glue to roll the edges over and then tack the patch in place while I stitched; came out pretty well.
I love it when a fix comes together.