Lowepro Pro Trekker 300 AW Camera Backpack (Mica/Black) Lowepro's exclusive adjustable-torso harness system with Pack Jack tool provides a fully customized and comfortable fit 10-point adjustment system allows you to adjust and customize for a comfortable fit at top of pack, shoulders, torso, sternum, waist and lumbar areas. Removable/adjustable waistbelt with thick, mesh-covered padding offers support and comfort, plus wicks away moisture. Hydration-ready side pocket contains a removable, seam-sealed hydration pouch, providing easy access to 70 oz. (2 L) of liquid Removable "checkpoint friendly" notebook sleeve in front pocket.