[TRAVEL LIGHT] : Expanded dimension: 11.81\'\'x 8.66\'\'x 20.47\'\'. Weights:1.4 pounds (640g). Easy to bring and reduce loads for day trips, vacation, day-to-day use, occasional travel, suitcase alternative, hiking, school, college, camping, cycling, and great gift for everyone. [EMERGENCY RESCUE WHISTLE DESIGN] : The top drawstring design, adjustment shoulder belt button and the chest strap with emergency whistle buckle design are practical for men and women. [CLIMBING STICKS] : The design of both side adjustable straps can hang trekking pole is convenient and practical. The small zipper bag at the top of the bag is designed to facilitate the collection and release of small items. [WATERPROOF NYLON& COMFORT] : This outdoor travel backpack made with high quality material nylon and polyester lining, anti-scratch, soft, durable, rip and water resistant. The body side and shoulder straps have excellent thick breathable mesh padding, offering your back plenty of cushioned comfort. [TRAVEL ORGANIZER] : Main compartment is Large enough to carry what you need, laptop, iPad, book, clothes, camera and snack. Outer smaller pocket great for quick access such as guide books and towel. Put your maps and charger in the surface pocket. Two large side mesh pockets for water bottles or umbrella.