theory mens black yellow climbing shoes Size:43.5 the DYNADOUBLECLIP double lanyard is Size:Uk 9.0 (Eu 43) the DYNADOUBLECLIP double lanyard is used for belaying on big walls and to facilitate maneuvers when rappelling making crag sessions that much easier Theory represents the evolution of the species: the extreme sensitivity combined with high dynamism allows for unprecedented spreadability Upper: Microfiber and suede uppers with a tubular construction