If you are planning a trek in a moist or humid environment then the Bergen 30 backpack from Fjallraven is for you. It boasts extra waterproof construction as well as a waterproof lining to keep your belongings dry. Ventilation also helps to air the bag. The backpack has an?Ergonomic back panel and reinforced bottom for comfort during long treks and is des Gned with ease of use in mind with a?roll down top access to the main compartment, multiple outer stretch pockets and two zip pockets on the straps. To The Front you will find?attachments for trekking poles as well as a safety reflector and a safety whilst to the chest strap.