I love my Crocs but not at work. I was wearing them out way too quickly. The tread on the bottom would be gone within three months. Plus, I found out the hard way that a dropped needle will get stuck in the shoe (I only wore the closed version).
Now I wear Birkenstock clogs. It's got the classic Birkenstock foot bed but it can be removed and the shoe autoclaved if need be. Why you would "need" to autoclave the shoe is beyond me but at least I know it can be washed in hot water!

They are harder than Crocs so a needle would bounce off the shoe rather than get stuck in it