1.[Expandable Capacity & Suitable for 17.3 inch Laptop]: This laptop backpack has a laptop compartment with good thick cushion, which can protect your laptop well and suit for 17.3 inch laptops as well. This travel backpack has lots of space and pockets for what you need it for, can extend from 35L to 40. A good companion for 3-7 days travel. (Backpack Net Weight: 2.5Lb) 2.[As Personal Item Airline Approved]: Exclusive designed for airplane traveling, this carry on backpack can be opened ly 90-180 degree easily and quickly at the airport security. Designed to fit the maximum size allowed on a flight, it is available to keep under the seat in flight as personal item, for airlines such as Spirit, Easy Jet, Jet Blue. 3.[Two Toiletry Bags]: comes with two toiletry bags to carry your hair and bath products, liquid hygiene or whatever you may need. The backpack also has a wet and dry compartment to keep your dirt clothes. 4. [Material & Anti-theft Design]: This travel backpack for women is made of durable waterproof polyester, good in air permeability and heat dissipation. Backpack back zipper pocket protects your precious items, such as wallet, passport, and ID card from potential theft when traveling or lining up. (Clean Tip: Scrub with a cloth if necessary)