I've observed in the OR in 3 different hospitals and the standards of dress were different in each.
The first (community) required you to wear scrubs
in the OR suite (I assume that's the correct term for the hallways and other rooms around the actual Operating Room), but you only had to wear hats and masks in the actual OR (and the mask only when there was a patient with an open incision - ie, after closing, the staff would often remove their masks) and shoe covers were not required at all. In fact, the people who wore the shoe covers, were wearing them to protect their shoes, ie, if they wore clogs that they weren't concerned about getting "dirty" they didn't wear them.
The second and third were teaching hospitals. The 2nd required scrubs, hats, masks and shoe cover in the OR suite. The 3rd required that, but also required that hats, masks and shoe covers be removed when leaving the OR suite and a long lab coat be worn over scrubs outside the suite.
So, what is the standard in your facility and why the difference?