The Kobuk 28 bag has a total volume capacity of 2800 cubic inches.  It includes the Kobuk Frame. The bag and integrated, adjustable load shelf are primarily made of 500D Nylon and feature a 10" expandable, drawstring top made of lightweight ripstop.  Excluding the expanding top, the bag measures 6" x 14" x 24".  The Kobuk 28 is best suited for day trips and can be compressed to a lower profile while not utilizing the full capacity of the bag.