These bags are made from high quality genuine cowhide. Each backpack has a large interior area with small zip pocket inside. Drawstring closure and backpack shoulder straps zip closed for on shoulder carry or unzip for on back carry, (adjustable nylon and leather strap).  There is a side zipper and front zippered pouch outside. Contact us for available colors. X-Large measures: 17" x 12" x 5" Large measures: 12" x 10" x 5" Medium measures: 8" x 9" x 5" Mini measures: 9" x 7" x 4"