3CLOUD and its particular presence of holes on the sole has been designed down to the smallest detail to ensure unique comfort while walking. In particular, these tunnels that run perpendicularly along the shoe guarantee a unique cushioning effect to the support of the foot on the surface and a consequent high rebound when the foot releases forward. This feature is guaranteed throughout the useful life of the shoe, thanks to the high “memory” property of the polyurethane material making up the sole, and above all thanks to a trapezoidal geometry of the hole designed to minimize deformation.