Packing light is the key to enjoying a Komodo cruise. Most travelers bring a small backpack rather than a heavy suitcase because boat cabins have limited storage space. Essentials include light clothing, swimwear, a hat, sunglasses, and a reusable water bottle. A light jacket is useful for windy evenings, and quick-dry clothes make life on the boat much more comfortable.
Since you will spend a lot of time in the sun and water, bring reef-safe sunscreen, sandals, sturdy walking shoes for Padar and Komodo Island, and a dry bag to protect your phone and valuables. Snorkel gear is usually included on Labuan Bajo cruises. If yours is a budget boat from Lombok, you may need to bring or rent your own mask and fins.
A power bank is helpful, although most boats have electricity for charging devices. If you wear prescription glasses, consider bringing a strap so they do not fall in the water during snorkelling. Motion sickness tablets are good to have even if you rarely get seasick, because the water can be choppy at certain times of year.
Do not forget toiletries, personal medications, and some cash for park rangers or small purchases on the islands. Keep your packing simple and practical. The less you bring, the easier your time on the boat will be.