The Carrier backpack is designed keeping in mind need to power up & stay connected. Its unique USB pass-through technology allows you to plug in your power bank inside the bag while you use the external USB port to charge your device & use it on the go! Made with high-grade waterproof material the Carrier Backpack keeps your device safe and lets your travel carefree. Its breathable mesh back allows air flow to pass through it cool & sweal free. The external padded shoulder straps help reduce the weight on your shoulder over long journey.