Main zippered pocket with suspended computer sleeve keep laptop safe and above ground Internal mesh-sleeve organizer pocket Second zippered pocket with mesh organizer sleeve Top zippered pocket is fleece-lined for electronics Side-zip organizer pocket with detachable key chain Stretch woven water bottle pocket Stowable attachment straps hold towel, yoga mat or jacket 3-D spacer-mesh backpack straps and back pad wick moisture, dry quickly and allow air circulation Nylon webbing top handle Sternum strap with built-in safety whistle Shoulder straps have slots for clip-on attachments Holds 15-inch PC or smaller Fabric - 300-denier double weave polyester (47% recycled) Lining - 200-denier polyester Fabric is coated with polyurethane and a DWR (durable water repellent) finish Specifications: Size: 20L / 1200 cu in Dimensions: 17.5" x 10.5" x 5" Weight: 1 lb 12 oz