Look, there are things that trainers and supervisors HAVE to tell you. They tell you to use the hand-to-surface method, but they don't really mean it. It's to cover their asses. "Did you tell him he could wear a tank top?" He can't say yes, or it's his ass if you get cut bad. I've seen guys wear gym shorts sneakers and "Muscle" shirts. I don't doubt it gets hella hot unloading, it gets hot loading. I wear jeans a T-shirt and steel toes everyday. But you can pretty much wear what you want without it being ridiculous...No crocs or flipflops. Sandals would work

. Kidding. If you've not made your 30 days though, just tough it and wear semi-appropriate stuff. Bottom line, dress code not strictly enforced. Atleast not at my hub.