Proper dress is business casual for the RJO course. No uniform type stuff. Just bring what you have. After about 2 weeks you will be begging to wear your jeans, and they won't complain either. They are more strick on the dress code for the long term students. Pack stuff for your down time to wear too. One guy only packed dress shoes and was stuck playing volleyball in a swimsuit, black socks and shoes lol. Enjoy your time there. It's not to hard and they will reteach it all a different way in DFW.