The bag is made of waterproof PU material which makes the bag water resistant also ideal for winter sports or as a laptop backpack for on the bike. The backpack has a large main compartment which can be closed with a water resistant zipper. In the main compartment with zipper there is a zipper pocket, a phone pocket, a slip pocket and a laptop compartment for a 14.1" laptop. On the front of the bag are a horizontal zipper pocket and a vertical zipper pocket. In the horizontal zipper pocket there are two slip-in pockets, two pen compartments and a zipper pocket. On the sides there are two inset pockets where, for example, a water bottle can fit. The back panel and shoulder straps are quilted, this allows you to wear the bag very comfortably.