NWT Cotopaxi Packable 24L Luzon Backpack in one-of-a-kind colorway. One of my favorite bags to travel with. Constructed of nylon, it packs down small and is always ready for a day trip. Plenty of storage with multiple pockets to keep organized, and two exterior mesh water bottle pockets. Lightweight, breathable, and adjustable shoulder straps that include an adjustable sternum strap. It also has a waist strap to help keep the load balanced.