★ FUNCTIONAL MODULAR STORAGE & SPACE: Our laptop backpack for men & women is specifically for short travel. As the picture shows, three different detachable and replaceable packing cubes are free with the mens backpack for travel to help you further organize things: electronics bag , make-up bag and ETC bag. If you want another storage bags, welcome to search "bag for ARUNGOR" for more information. ★ USB PORT & WATER RESISTANT: Large capacity, USB port & durable material. ARUNGOR backpack for women is suitable for 15.6 inch laptops and Macbook. With USB charging port and built-in charging cable, you can easily charge your electronics devices like cellphone while walking (our carry on backpack doesn’t charge itself and portable power bank required). Made of water resistant and durable Oxford, our back pack is sturdy and tear resistant. ★ LUGGAGE STRAP: A luggage strap allows backpack fit on luggage/suitcase, slide over the luggage upright handle tube for easier carrying. With a hidden anti theft pocket on the back protect your valuable items from thieves. Well made for international airplane travel and day trip