Made of waterproof Oxford cloth fabric, which is wear-resistant and scratch-resistant. There is an external USB port, you only need to put the power bank in the bag, and you can easily charge the phone while walking or working. Suitable for travel, work, student going to school and outdoor travel, etc. It's also a great way to expand your brand.Welcome to your inquiry! 16 1/2"Lx12 1/4"Wx4 3/4"H