USB TOTE BAG: With built in USB port interface, it's convenient to charge your phone or other electronic devices while keeping your power bank inside of the bag （Power bank is not included) STRONG AND DURABLE STRAP: The strap is 1 inch wide and made of 2 layers of sturdy fabric. It can hold up to 50kg without any issue. If you have any questions,send email to us. SPACIOUS AND LIGHTWEIGHT BRIEFCASE WOMEN: This laptop tote is large and spacious. There are two main compartments inside. One section is for laptop, where velcro strap is attached to secure your computer in place. The other compartment can hold almost everything you need for work such as umbrella, drink bottle, purse, day planner, keys and small carryall. It's a large tote bag to stuff between work, school and travel.