1️⃣150% Higher Density Material – The laptop backpack is made of latest lightweight 600D fabric material with higher density, more durable and comfortable, first layer water repellent second layer make of water-resist PVC, keep your valuables safe in bad weather condition. 2️⃣Well-padded for Your Laptop – Not only front and back, left and right, the bottom of the laptop sleeve is well padded with foam, provide extra protection for your laptop notebook, the sleeve size fit laptop up to 15.6 inch. Structured design keeps the backpack in shape whether empty or full. 3️⃣Unique 2-in-1 Interface – Built-in USB Charging Port is a great convenient to charge your device by the connected power bank (POWER BANK is not included), a small power bank pocket is designed to organize your phone and power bank. Headphone interface frees your hands when enjoying audios, music, etc.