Its expandable size is 16x12x6.4”,but the foldbale size is 8×9”. It has 35L of storage space for laptops up to 14″ and mesh pockets on the left and right sides for water bottles and umbrellas, which distribute the weight of the backpack perfectly. The ultra-lightweight design brings lightness to travel and outdoors activities.A true space saver, to avoid overweight charges. Stuff the bag into its own pocket for storage and unzip it when you need it. This foldable Lightweight Hiking backpack is a must-have on any trip and a great gift for anyone!