The Lowepro Slingshot 300 AW is the largest model of Lowepro's Slingshot cases. It is similar to the Lowepro Slingshot 200 AW and Lowepro Slingshot 100 AW but significantly larger. Characteristic of a sling type of case is the single padded and liberally adjustable shoulder strap that goes over the head and hangs on a shoulder. The Slingshots are designed to hang from the right shoulder. Unique to the Lowepro Slingshot 300 AW is the full weight-supporting waist belt instead. There is a lot of room in the bag - it is essentially a backpack without one of the shoulder straps. Outside dimensions without the strap are 17.5" long, 12.5" wide and 7.5" deep (445mm x 320mm x 190mm). The main storage compartment is 10.5" wide, 12" high and 6" deep (265mm x 300mm x 150mm). Divider pads in the main compartment are held in place by strong hook-and-loop fasteners and are reconfigurable.