Nike Pro Adapt system features padded straps and back panel for an ergonomic fit Durable, weather resistant material deflects dirt and water Double-zippered main compartment 2 x mesh side pockets add extra space for water bottles Haul loop at the top for an alternative carrying Daisy chain at the bottom provides space to attach keys Head out into the world with Nike's Alpha Rev Backpack. With a large compartment, multiple side pockets and internal pockets, the Alpha Rev Backpack has everything you need. Made for comfort, the Nike Pro Adapt system ensures padded straps complete the premium experience by offering an ergonomic carrying option.