When you need everything for anything, grab the Chacabuco and go. It houses all your gear in three separate compartments, has reflective piping for night commutes and an exterior shock cord for additional stowage. The generous main compartment carries most things, and comes with a padded sleeve that is raised to protect up to a 17-inch laptop. Equipped with a tube port, the sleeve also accepts a hydration reservoir when you leave your laptop at home. A secondary pocket stores everyday necessities like keys, pens and a phone. A zippered outside pocket holds protein bars, and a microfleece-lined top pocket protects sunglasses or an audio device. Two stretchy pockets keep water bottles within reach. The Chacabuco's suspension system uses heat-venting airflow-mesh shoulderstraps and back panel, a webbing waistbelt and a sternum strap with an emergency whistle. Compression straps stabilize the load. Made of a 420-denier 100% nylon oxford plain weave with an 840-denier 100% ballistics nylon bottom. The lining is 200-denier 100% polyester. All fabrics have a Deluge DWR (durable water repellent) finish.