Hiking backpacks are built for multi-hour treks: back ventilation, a padded hip belt for weight distribution, and often external pockets for a water bottle or rain cover set them apart from a simple daypack for the city. A day hike usually needs less volume; multi-day trips with a tent and kit need considerably more. At BagAge, hiking backpacks from GOT BAG, ORTLIEB and otinga can be compared by volume.