Passport and travel documents. These should be the first items you need to pack in your backpack, whether you are traveling internationally or even domestically. You will not be able to enter any country without a valid passport, and your ID will be required for certain activities such as renting a car or checking into a hotel .Your travel documents such as flight tickets, hotel reservations, travel insurance, and other relevant documents should be kept in a safe place and easily accessible. These documents will be required at various stages of your journey, and losing them could result in significant difficulties.

1. A reliable and sizable travel/duffel bag. I own a 48L Osprey Exos backpack I travel with sometimes but currently I use Patagonia’s Black Hole 55L duffel bag. The Exos pack is one of the lightest backpacking bags out in the market. What is fantastic about the duffel bag is that you can carry it onto the plane if you want to save some money and would like to keep your pack with you. Furthermore, they’re sturdy, water resistant, and comfortable enough for extended treks.

2. Waterproof jacket and wool socks. I'm not going to list clothes on this list as that should be pretty self-explanatory... but I highly recommend a waterproof jacket and wool socks. The jacket saves you room from packing an umbrella and you can wear this as an outer layer when you walk around even if it’s not raining. Wool or even Merino blend socks are worth bringing because they are quick drying, full of warmth, and odorless, which means you can wear them multiple times before washing.

3. Small first-aid kit. It’s crucial to bring any prescription drugs or other OTCs that might help you if you succumb to the weather or eat something bad.

4. Correct electronic charger/adapter. Make sure you also pack the appropriate chargers and adapters to keep your devices powered up. 110-120V AC 60Hz: Standard power output used in North America, Central America, and parts of South America. 220-240V AC 50Hz: Used in Europe, Asia, Africa, and Australia. In addition, countries have different outlet styles. Type A & B: 2/3 prongs. Found in US, Mexico, and Japan Type C: Two rounded pins, typically found in European countries Type G: Three flat prongs, typically found in the UK, Ireland, Hong Kong and Singapore There are 12 types to be exact, so be wary of the type of adapters you would need to purchase