Whether or not you should lock your backpack while travelling depends on various factors and personal preferences, here are some considerations to help you decide: Destination: The safety of your travel destination plays a significant role. In some places, theft is more common, while in others, it's relatively rare. Research the safety conditions of your destination and consider the local advice. Type of Accommodation: If you're staying in hostels or shared accommodations, it's generally a good idea to lock your backpack. Lockers may be available for this purpose. The need for locking your backpack may be lower in hotels or private accommodations. Valuables: If you're carrying valuable items like electronics, passports, or money, it's essential to secure them. A lock can be an extra layer of protection. Day vs. Night: During the day, you might be carrying your backpack around, making it less likely to be stolen. Locking it up at night or when you're not actively using it can provide peace of mind. Type of Lock: If you lock your backpack, choose a sturdy lock that is difficult to tamper with. Combination locks or small padlocks are common choices. Accessibility: Ensure you can easily open the lock if needed, especially at security checkpoints or customs inspections. TSA-approved locks are designed to be opened by airport security when required. Group Travel: If you're travelling in a group, you can take turns watching your belongings, reducing the need for locking everything up all the time. Local Customs: In some cultures, locking your bag might be seen as distrustful or unfriendly. Be sensitive to local customs and norms. Travel Insurance: Consider having travel insurance that covers theft or loss of belongings. This can provide financial protection in case of theft. Generally, taking precautions to protect your belongings while travelling is wise. This may include using a lock on your backpack, but the level of security you need can vary based on your circumstances. Always use common sense and trust your instincts when locking your backpack.