Veteran travelers often recommend a small suitcase with wheels and a retractable handle that you can often take aboard international flights as carry-on luggage. Officially, economy passengers are only allowed one item of cabin baggage with overall dimensions no greater than 115 centimeters. The bag must be able to fit under the seat in front of you, and must not weigh more than five kg (although airline staff often allow more). In first and business classes you may carry two bags aboard, which when added together do not exceed 115 cm or seven kg in weight. Larger bags are supposed to be checked in at the airline counter. All carry on luggage is subject to strict security controls.
Also ideal is a soft medium-size backpack with a lightweight internal frame. The best packs have a zippered compartment in back where you can tuck in the hip belt and straps before turning your pack over to an airline or bus. This type of pack has the flexibility of allowing you to simply walk when motorized transport is unavailable or unacceptable; and with the straps zipped in it looks like a regular suitcase.
Make sure your pack allows you to carry the weight on your hips, has a cushion for spine support, and doesn’t pull backwards. The pack should strap snugly to your body but also allow ventilation to your back. It should be made of a water-resistant material such as nylon and have a Fastex buckle.
Look for a pack with double, two-way zipper compartments and pockets you can lock with miniature padlocks. They might not stop a thief, but they will deter the casual pilferer. Keep valuables locked in your bag, out of sight, as even upmarket hotel rooms aren’t 100 percent safe. To lock your checked-in luggage for flights, use nylon cable ties available at any hardware store. If customs officers want to inspect your bag they’ll be able to cut the ties easily and upon arrival you’ll know at once if someone has been inside.