It’s a good idea to dress modestly in Indonesia because it’s a sign of respect for local culture. Although beachwear is fine by the sea or pool, cover up elsewhere in public. Indonesia’s weather is hot and humid so pack light clothes in natural fabrics such as cotton or linen. If you’re planning to climb one of Indonesia’s mountains or volcanoes, pack a fleece or warm jacket as temperatures are far colder at altitude. If you’re visiting temples or mosques, you’ll need to make sure your arms and knees are covered, and women should cover their heads.