How to keep healthy hair with tight bun?

Hi everyone, I just got hired as a restaurant worker and one of the requirements is that my hair needs to be in a tight bun with gel/products quite often. I'm trying to grow my hair longer and healthier so I'm a little worried since I can really feel my hair getting tugged at when it's in a tight bun. Does anyone have any recommendations for pins/products that are less harsh on the hair? I have medium-long 1b hair of medium thickness and fineness. Thanks in advance :)