Lowepro Pro Trekker 400 AW Camera Backpack (Mica/Black) Lowepro's exclusive adjustable-torso harness system with Pack Jack tool provides a fully customized and comfortable fit; Using the Pack Jack adjustable tool, the wearer can shorten or lengthen the distance between shoulders and hips Removable/adjustable waistbelt with thick, mesh-covered padding offers support and comfort, plus wicks away moisture. 10-point adjustment system allows you to adjust and customize for a comfortable fit at top of pack, shoulders, torso, sternum Removable "checkpoint friendly" notebook sleeve in front pocket.