Well, who could say ;-) At least something not related to snow or cold ....of which we have little in Africa..... but rocks and deserts we have plenty. And don't think about goretex in a desert boot ....the sweat is trapped.
Current favourite desert boot is the Meindl Desert Boots. I weight in just a tad over 220 lbs and normally a light hunting packs add about 25lbs to that. I have found ankle support great, grip superb and ventilation top notch. I am really impressed with these German boots and so too, the SAS as they issue them. On and off is great as the lacing is metal loops and hooks and super fast. Overall I'll rate this boot 9.5 out of 10. Can be pricey. Just makes the grade for a heavier (70 lbs+) pack in rough terrian. Wear has been minimal and no damage to sole on rocky terrain.
Previous pair, Blackhawk Warrior Wear Desert. Just does not have the quality feel of the Meindl's. Lacing is slow, support is well below Meindls but comfort is superb. A cats whisker lighter than Meindl's but sole wore quickly in rocky terrain with small chunks coming off. Ankle support not enough for a heavy (70lbs+) pack on rough terrain. Rate it about a 7/10.
Danner Desert USMC issue. Built like a tank, great lacing, very confortable once broken in, soles are great for grip if a little stiff. Great ventilation. Quality on par if not beter material than Meindl's. Noticably heavier than the Meindl's and Blackhawks but support on ankle a notch above the above two. Superb for carrying a fully loaded pack (70lbs+) in rough terrain. Rate 9.5/10.
If you want a light/medium boot for desert usage with pack below 30lbs, I would get the Meindl. For heavy/medium usage in very rough terrian the Danners.