Before going

Think about warm clothes and good sport shoes if you want to trek or enjoy the countryside walks in the mountains, and if you plan to climb a volcano at night time, warm clothes are recommended as it can be very cold. In any case, you can always buy clothes after arrival, cheap and suiting to the weather.
Although you can find all these products in Indonesia, we recommend that you take products for mosquitoes and for the sun, a cap or a hat, sunglasses and a small bag to carry a few things in case you have to leave your big suitcases at the hotel for a few days.
Indonesia by and large is safe, but the country is so vast and different that there are definitely things to avoid.  For this reason we recommend that you leave your belongings such as gold and jewellery at home.
For safety reasons, we advise travellers not to leave valuables in vehicles during their journey.