I typically only wear solid color shirts, button down or polo, with my kilt as it is a tartan, Maclaren modern. Can't imagine putting stripes or other designs with plaids. Wal-Mart has some shirts, khaki, dark blue, etc that have two pockets with flaps, short or long sleeve for $10.00 And....they are 100% cotton which I also like as I try to stay away from synthetic fabrics. Just my 2 cents worth.
Respectfully,
David