When you replace soil with concrete, Borealis Classic does not need to change bags. It has 29 liters of space, enough to accommodate extra hiking clothing and lunch, or fitness necessities, books, and a dedicated pocket to hold your laptop. Belts and chest straps provide extra comfort when hiking with heavy loads, but you can put them away or remove them while commuting. No matter where you walk, a padded air mesh back panel and foam strap ensure Borealis Classic is extremely comfortable. Don't forget to have a storage bag, two water bottle bags and an auxiliary compartment in front.