Having warm and humid weather most of the time, it is essential to carry light clothing, cottons are preferable. T-Shirts, longish shorts, loose pants, and dresses are ideal. Remember that less is best when you pack your suitcase. This means packing clothing which can be used multiple times by wash and wear, with the tropical climate drying is easy or there are many 'wash and dry' centres you can opt to use. A word of caution, have a shawl, a sarong or a long dress covering your knees if you intend to visit places of worship as modesty in dress is appreciated. If you plan to visit the hill country in Sri Lanka where temperatures are much cooler, have a few light warm pieces of clothing packed too.