What's it do? Product Description: This backpack does it all. It's water-repellent for the rain, tough as nails, comfortable as anything, and has all the pockets you need to hold all your stuff. Water-resistant UA Storm technology keeps you stuff dry. Breathable mesh padded back panel & adjustable, HeatGear® shoulder straps for total comfort. Soft-lined laptop sleeve—holds up to 15" MacBook Pro® or similarly sized laptop. Water-repellent front valuables pocket. Large, expandable front laundry/shoe pocket at bottom of bag. Molle webbing & D-rings on shoulder straps for additional attachment points. Tough, abrasion-resistant bottom. Two side water bottle pockets. Top grab handle. Dimensions When Full: 6.3"W x 20.1"H x 12.6"L. Volume: 1,769.7 Cubic In. / 29 L. 100% Polyester.