Oh, come on - like you don't care what you look/ feel like in your uniform? People who say they don't care what their uniform is like usually are the ones that have to wear ugly uniforms!
You are in public, people can see you (don't you care what you wear when you go out?) and most importantly - if the uniform is not comfy or is made of some cheap material that is not Hot - Weather - Friendly - you will not be happy wearing it for those Oh - So - Long duty hours.