💻USB PORT DESIGN: External USB charger port with a built-in charging cable to help you easily charge your devices. You can charge your mobile devices without opening up the backpack. Please noted that this backpack doesn t include power itself; 💻COMFY & STURDY: Comfortable airflow foam pad back design with thick but soft multi-panel ventilated breathable mesh padding offers you maximum back support. Breathable and adjustable shoulder straps relieve the stress on your shoulders and make you feel 20%-25% less weight; 💻FUNCTIONAL&SAFE: 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 it efficiently protects your valuable items from thieves. Well made for international airplane travel and day trip; 💻HIGH QUALITY & SOLID: This laptop backpack is made of durable polyester fabric with dual metal zippers, scratch-resistant, anti-tear, and water splashing resistant. Ensure a secure & long-lasting usage every day. Serves you well as a professional office business work bag, slim USB charging bag pack, outdoor travel daypack, and college high school big student backpack for boys, girls, teens, and adults.