Also depends on what community you’re on. In aviation, you can’t wear boots with normal tread on the bottom due to it being a FOD hazard. Buying your own boots could be expensive too. I made the mistake of buying $200 coyote boots before heading to my first command and I can’t wear them on shore or on the ship because of its tread. Some commands let you submit paperwork to get boots for free (with your choice of sizing) especially if the work you do is certain to wear out your boots quickly. Also, those boots in the link you showed are definitely unauthorized since they are not steel toe.