Klein aber oho.We call this backpack get stuffed, and that´s exactly what it does.It is our new and innovative Ultra Light Stuff Pack ™.In seconds, this lightweight backpack zips into its own pocket and becomes the size of an apple.Constructed with a Deluxe Air Mesh ™ harness the backpack offers a comfortable fit, unusual for a compressible bag of this size.For easy access and organization, we´ve included a hidden zippered pocket, an internal security pocket, and a stretch mesh water bottle pocket.In addition, you will always be well seen with the backpack thanks to its reflective graphics.All these features make it a perfect day-to-day backpack that won´t take up space or weight in your vacation luggage.