Tested in the Alps: the Salewa 25L Alp Trainer backpack - We12Travel
Salewa ALP Trainer 25 - Comfortable, well-ventilated technical backpack for hiking and trekking backpack with reduced contact surface and split shoulder straps for increased breathability and Twin Compression System for load control.
Amazon.com : Salewa Alp Trainer 25, Black, 55x24x27 cm, 25 L : Sports & Outdoors