The perfect combination of synthetic and natural materials, this shoe is the ideal compromise between comfort and technicality. The use of linings only on the toe and on the heel, leaving the central part unlined, allows the climbing shoe to combine the qualities of breathability and comfort of leather with the precision and durability of an lined shoe. The patented edge randing system is an active part in the functioning of the shoe and distributes the plantar tension progressively. The asymmetrical lacing system allows custom adjustment of the interior volumes. The particular construction system, which places the sole only on the front part of the shoe, allows for a better snug fit of the arch, while the heel adopts a modern construction designed to improve performance in heel hooks. Testarossa: an instant classic.