Tatonka storm 25 litre rucksack this tatonka storm 25 litre rucksack has been crafted with x vent zero system technology which allows maximum levels of control and ventilation whilst having minimal contact with your back this rucksack also benefits from being adjustable so you can carry heavy objects close to your body and the body strap ensures you can get a secure fit rucksack includes rain hood top lid open and closure walking pole attachment air mesh adjustable should