The Under Armour Undeniable Duffel Bag will provide you with not only all the storage you need, but also the durability to last you a long time. features Under Armour's Storm technology. The Storm backpacks are finished in DWR (Durable Water Repellent) that is meant to repel water, while keeping the bag loose and breathable. The padded HeatGear shoulder straps are extremely comfortable and adjustable so you can customize the fit! For storage, the Undeniable Duffel Bag has the large main pocket, a smaller front pocket, and two vented end pockets, one of which is expandable to fit more!