Flexible and practical, the XD Design Flex Gym bag is the first business backpack and gym bag in-one. Convert the backpack from business to gym style by simply expanding the front pocket. Going from 16 to 24 liters capacity. The anti-theft design with no front access and hidden zippers in the main compartment will assure that you carry your professional devices securely. With the RFID-protected pocket on the back, you can safely store your wallet, cell phone, or credit cards. This backpack keeps you powered with a USB charging port on the shoulder strap. You can also find a sunglasses holder on the shoulder strap. This is the perfect backpack; whether you are on your way to work, university, or the gym.