Looking at the climate chart for Namibia or Nicaragua, you would only need to pack shorts. But when you think of the undergrowth that eagerly scratches your legs, sunburn and unwelcome wildlife in the desert, then long pants are a better choice. So, I usually go for zip-off pants, which you can quickly turn into Bermuda shorts when the situation calls for it. The NATA model has become a constant companion on my trips. We had freak weather only recently while trekking along the legendary GR20 long-distance trail in Corsica. In order to get to Lac de Capitello, we had to cross snow fields while battling icy wind and thick fog. We then continued to the Punta Alle Porte summit in pouring rain. The pant legs obviously stayed zipped on during those kinds of conditions. These pants can withstand the wind and cold really well. Their water-repellent properties, similar to softshell, also helped them defy the first drizzle. I only had to slip on my rain pants when it started bucketing down.