Weather: Islamabad has a moderate climate, but can experience rain throughout the year. It's important to choose a backpack luggage that is water-resistant or waterproof to protect your belongings.
Culture: Pakistan is a conservative country, and it's important to dress modestly and respectfully. Choose a backpack luggage that is not too flashy or attention-grabbing.
Practicality: Islamabad is a modern city, but you'll likely be doing a lot of walking and sightseeing. Choose a backpack luggage that is comfortable to wear and has enough space to carry all your essentials, such as water bottles, sunscreen, and snacks.
Security: Islamabad is a safe city, but it's still important to choose a backpack luggage that has anti-theft features such as lockable zippers or RFID-blocking pockets.
Based on these factors, a good backpack luggage to carry when visiting Islamabad would be a sturdy and water-resistant backpack that can also be used as a carry-on. Look for backpack luggage made of durable materials such as nylon or polyester, with a capacity of around 30-50 liters. Choose a backpack luggage with multiple compartments for organization and easy access, and with comfortable padded straps and back panel. Additionally, it's a good idea to choose a backpack luggage with anti-theft features, such as lockable zippers or RFID-blocking pockets, to keep your belongings safe while traveling.