Good dressage boots

[pocket]

Having been out of competitions for nearly two years due to injury, until my accident, I had been more of a showing bod and dabbled in dressage, but now I'm not too good at running up, so, it is dressage for me

Can anyone suggest a good pair of boots with a good tread as I need to be able to anchor my foot so to speak and not have a slippery sole

Any suggestions??