The smallest model of the Trion series that can be used as a daypack on the Alpine Tour. It features a lightweight and comfortable carrying comfort like a trail running vest. The highly water repellent and abrasion resistant Trion series has a painstakingly detailed attention to detail, including professional alpinists, Stephan Siegrist and Nico Hojac. Trion 15 is primarily recycled material with a roll-top closure with a zipper closure. Easy access from the side to the main compartment.