I do not know where and how they go in for sports, but I know for sure that each of the athletes has professional equipment, thanks to which they can normally conduct their matches. After all, if you do not have equipment such as gloves and a helmet, then you will receive much more blows and much more injuries. Of course, no one knows where the professionals buy their equipment, but I know where you can buy it, that is, I know the site that will tell you about it, this is the site
https://fighterculture.com/best-boxing-gloves-for-heavy-bag/. He knows the 10 best boxing gloves and where to buy them at the best price in your country.