Just because
Thailand is notorious for being hot and humid, doesn't mean that you shouldn't travel there. Wear light, breathable clothing that hides sweat stains, and if you're hiking, bring proper hiking boots and athletic-type clothing that will keep the bugs away. Be sure to pack shoes that you can remove easily as many city attractions, such as temples, require you to take them off before entering. Women may also benefit from having a shawl to cover their shoulders when visiting temples. While the country is a bit conservative in dress, swimsuits, shorts, and tank tops are completely acceptable, especially when visiting beach areas.