The M-Wave Deluxe foldable Rucksack (backpack) transforms from its neat self-contained compact (16x11x8cm) folded state into a useful size rucksack in seconds. Generous storage space and the elastic outside pockets give this bag Tardis like capability. Trekking tours and athletic trips can be mastered easily when the shoulder and chest belts are correctly adjusted beforehand. An integrated helmet holder adds a handy feature for cyclists when trekking off the bike. 2 elasticated side pockets add more features that cyclists will appreciate.  A clever mini-packhorse by M-Wave