Get some Adidas slides and maybe a pair of basketball socks. The truck will be magically broken down for you and everything will be spotted for you too. If your store is a tiny bit different, I dunno, invest in some ****ing steel toe boots, Dr. Scholls, and a helmet.
As long as there comfortable and cheep because you will wear holes in the sides with the concrete I usually use skate shoes because there triple leather on the sides and last a bit longer as long as your not a dumb ass and roll a pallet jack up your foot you'll be more then fine just avoid mesh running shoes they lasted less then 2 weeks