Backpack is for an armor vest and load out system, mounts to the back panel with MOLLE.
Though this backpack has a very compact size, it allows to carry the medium weight of items.
In the compartments of the backpack you can place a hydration pack, dry socks and other compact clothes, tools, a ration pack, as well as additional weapon magazines and grenades for long airsoft games and hikes.
The compartments of the backpack close with a zipper.
Excessive (unused) volume can be pulled together with special straps, so the items do not roll inside the backpack and it has the most compact appearance.
It needs 4 MOLLE webbing cells in width and a minimum of 5-6 webbing cells in height (for ideal mounting, 10 webbing cells in height are needed) to mount the backpack to the equipment.