The most robust and protective phone case you can buy for any phone. I've had 3 different sets of the Defender Pro for 3 different phones and I've loved all of them. I especially like the included holster cuz I can use it as a stand. No extra accessories needed.
I have used the Otterbox Defender Pro for a few years now and they protect your phone very well, I like the new design of the camera cut out, and the belt clip doesn't interfere with the power button like on the s21 ultra that I used to have.