Lightweight cycling backpack also suitable for endurance sports and cross-country skiing. The design provides for a water reservoir. It is equipped with adjustable breathable straps. Of course, there is a padded, ventilated back. Lightweight cycling backpack also suitable for endurance sports and cross-country skiing. The design provides for a water reservoir. It is equipped with adjustable breathable straps. Of course, there is a padded, ventilated back.