SurferKris said..
The Atan in 3mm usually last me about two to three seasons I think. Then sometimes one of my big toes will wear through, but I think that mostly comes from wear on the inside while being in the straps, rather then rubbing against the anti-slip of the board. After that it is usually time to replace them anyway, before they start to smell too bad....
PS. I used to prefer not using shoes, until I cut my foot badly once and then had to stay off the water for the rest of that summer.
I've used Atan Midi split toe boots for 10 years. The only other brand that gets close is the Ion Plasma with the internal split toe. I only got 1 to 2 seasons out of a pair when GPS sailing. Now I'm foiling I'm still on my first pair after more than 2. Obviously the full EVA deck pad on my foil board is easier on boots than the non slip on my Fanatic slalom boards.
Boot performance is significantly improved when fitted correctly. I usually wear 43/44 in street shoes. For both the Atan and Ion I used the next size down (40/41) as a firm fit it best and they stretch a little over time.