Windtook 28L Laptop Bag Computer Bag Rucksack Daypack College Bag School Bag Book Bag Satchel Bag Travel Bag Camping Bag Hiking Bag Sports Bag Weekend Bag Work Bag Casual Bag MATERIAL: Water resistance polyester fabric with the top of your backpack more protection. STRUCTURE: A total of 5 pockets. 1 main zipper Pocket, 2 front zipped pockets, 1 Laptop compartment pocket and 1 open inner pockets. APPROX DIMENSIONS: 18.1*15.7*7.1inches"W Capacity: 28L (Middle size fits up to 15.6" Laptop.) CAPACITY:Big capacity for holding your laptop, tablet, phone, pen, notebook, wallet, and other things as many as possible PADDED laptop compartment and tablet pocket for protecting your important computer which is for business and study.