Never rely on your checked luggage for absolute essentials, especially with the risk of delays or loss. No matter the length of your trip, your carry-on should always be treated as a survival kit. This must include at least one change of clothes, underwear, basic toiletries and any urgent medication.
Including a lightweight, packable rain layer is also a stroke of genius, keeping you comfortable upon arrival if the weather is miserable. This ensures that even if your main suitcase goes missing for 48 hours, you have the necessary items to stay fresh, take required medicines and cope without stress until your bag catches up.
