Indoor climbing shoe designed to adapt perfectly to the shapes of holds and volumes of indoor climbing. The Theory is an indoor climbing shoe designed to adapt perfectly to the shapes of holds and volumes of indoor climbing. The extreme sensitivity and high dynamics allow unique adaptability on the edges, making the shoe perfect for indoor use. The development of the Theory is based on a study by La Sportiva's R&D department on the gripping behaviour of gorillas and the sensitivity of cat paws, combined with the identification of developments in new indoor climbing routes, which are characterised by very wide volumes and extremely dynamic movements. This boot has been designed to maximise power and dexterity while maintaining maximum sensitivity on all types of holds. New construction with exclusive D-Tech™ technology (Dynamic Technology): the sole wraps around the sides of the shoe to make the lateral edges disappear, ensuring a dynamic approach and adaptability to the shapes of the most modern indoor holds. The Vibram® XS-Grip2 compound sole with differentiated thicknesses on the toe supports grip on the edges, while the reduced volume heel allows maximum precision on heel hooks. The rubber toe covers 90% of the front surface of the upper to support the toe hook while maintaining adaptability to different foot types. The overall construction of the shoe facilitates the application of pressure on the volume of the modern indoor route setting as well as the support during cross kicking thanks to its high adaptability. The upper Velcro fastening enables optimum tension regulation. Theory: climbing-species evolution!