The ULTRAPAC PRO 2in1 is a unique running vest that offers two uses. Thanks to the possibility of attaching a separate 7L pocket, you can choose whether you will have an ultralight running vest on your back with storage space exclusively in the front, or a full-fledged backpack with about 12 liters of storage space, in which you can pack even the most demanding mountain adventures, or if your gear is not completely minimalist.