I agree with Fig...when Stepsons used to come over they would never have socks or underwear. We finally bought all our own stuff and labeled it.
Now that they are older and all the clothes have to be name brand, they want to wear them to school...the clothes go back and forth because the boys now know if they want to wear their favorite stuff on the weekends then they have to bring it with them.
Tell JA that you will be sending them in shoes and the outfit they have on. He can wash the outfits and send them home in the same thing if he is going to be petty about things!