【BEST AIRLINE APPROVED SIZE】- Dimensions: 15.7x9.9x7.9in, weight: 1.1LB, capacity: 20L. Perfect size to comply with free baggage allowance and you can maximise your packing capacity with this carry-on backpack. It is also accepted on virtually all major airlines worldwide. NOTE: This backpack is a 20L portable model, if you need more capacity, please choose the larger model. 【HIGH QUALITY MATERIAL】- Crafted from water-resistant and robust polyester fabric, this travel backpack is designed to withstand the rigors of travel.Additionally, we've added a reflective stripe on the shoulder strap for enhanced visibility in low-light conditions, keeping you safe. 【MULTIFUNCTION 3 IN 1 TRAVEL BAGS】- This travel bag offers multiple carrying options to suit your needs. The top handle provides a comfortable grip for hand-carrying. For hands-free convenience, the length-adjustable shoulder straps allow you to wear the bag on your back. And when you're traveling with a larger cabin suitcase, the rear luggage strap enables you to easily attach the bag to your extendable trolley handle. 【EASY TO ORGANIZE】- The spacious main compartment has a suitcase-style opening to store various travel items. The front compartment with multiple pockets can be used to store notebooks, pens, earphones, electronics and other small items for quick access. A small front zipped pocket for your passport or tickets. 【MULTIPURPOSE】- This backpack is incredibly versatile. It's perfect for use as a travel carry-on, an office work bag, a business laptop backpack, a college bag, or a sports rucksack. No matter the occasion, it's up to the task. To give you complete peace of mind, the travel bag comes with a one-year warranty that covers all manufacturing defects. a simple and stylish cabin bag is the perfect travel companion. This lightweight travel bag fits perfectly within the Ryanair 15.7x9.9x7.9In underseat free bag allowance. It also complies with many airline regulations on carry on luggage sizes without the need to worry about paying extra fees.