"Good to know - This Sandstrom backpack is made to snugly fit your 15.6"" laptop - It's waterproof so your tech will remain dry - no rain check needed - It comfortably slips on your luggage, thanks to its trolley sleeve - Forgot to charge your phone? The USB port will be handy - The dual handles let you carry it however you want - It's expansion enclosure makes your bag even more roomy by increasing storage space"