An absolute innovation for the climbing stars of tomorrow. The new last is tailored to the specific ergonomic and anatomical needs of growing feet: the heel is narrow and straight to avoid irritating the Achilles tendon, and the toe box is specially shaped to prevent excessive compression of the toes. The Puzzle is very soft and flexible, promoting the natural foot placement behavior of young climbers as they "grasp" holds with their feet. This "claw effect" is enhanced by a slight recess in the last at the toe area. While the Puzzle is relatively aggressively shaped and has a strong downturn, it still offers excellent performance and is particularly suitable for advanced climbers. The upper is made from a single piece, which increases comfort by minimizing seams and also saves excess material. The tongue is made from breathable knitted material and is produced from recycled yarn.