We recommend you take a pair of hard wearing cotton based travel trousers, which will be more comfortable on hot, crowded buses and a lighterweight polyester based pair, which are great for trekking and activities as they dry quickly. Travel shorts and travel skirts are excellent in warmer places, but if you are on Safari, you'll want to have your legs covered to avoid biting insects. The Craghoppers Nosilife life is pretreated to kill biters on contact, and convtertible trousers are a great way to pack both travel trousers and travel shorts without taking an extra pair! Ensure you can wear a pair of thermals underneath if you know you are going into cooler climates. And if you're jungle trekking or heading to a place which may be rainy, waterproof trousers will be a great addition to your kit.