It is mult purpose camel bag.

Inside you will find special pocket for plastick water pouch and two hooks which will help you to secure it. Easily can hold 3L water pouch.

This backpack has standard shoulder straps, and straps for Molle system. With this solution it can be use separately or can be mount on vest.

Has also outside pocket with Molle stripes and Velcro board which will help you to mount extra accessories.