The Womens Crea Pro 28L Rucksack is a hybrid touring rucksack for women that sets new standards with its wide range of features and unique \"4 STREAM Butterfly Vario\" suspension system: Ventilation on all four sides helps to prevent annoying perspiration, a twistable butterfly frame gives the upper body great freedom of movement, the Vario system converts the ventilated air space suspension system into a full-contact back and the back length can be individually adjusted.