Temperatures can soar to around 80-90F degrees and you need to beat the heat during your tour of the Mekong, which is why you need quick dry pants and tops. While cotton can be comfy and cool in the hot climate, the fabric also absorbs and holds a lot of moisture, a quick dry fabric, on the other hand, will keep you light and dry no matter how much you sweat. Remember to choose the quick dry fabric for your choice of underwear too. Of course a Mekong cruise with one of the luxury river cruise providers will ensure your cruise is exceedingly comfortable, with many like Mekong Kingdoms offering tailor-made packages to some of the Mekong's best attractions, especially around the historic Luang Prabang district of Laos and charming riverside villages of north Thailand.