You like this stuff compared to other products? Do you use it on sneakers as well? I haven't been waterproofing any my shoes lately but I have a few pairs I want to do. How many pairs will one can cover?
i used the nano or the melatonian spray on all my slp's and they have worked well. that saphir bottle is very expensive i would compare ingredients to see if it's really worth it.
nano spray works well with sneakers too cause it's not for just leather but other materials. i have used it on my boosts and primeknit/ flyknit sneakers and it does really well
also combat boots take a long time to break in especially the all leather ones (military experience). i always suggest that its better to wear combat boots with a little space and buy the special boot socks that are really thick because it can be very painful.