A 3D printed structure of an elastic material having at least a first layer and a second layer may be provided. In one implementation, the 3D printed structure may include at least a first wall having a primary structural layer and a first flexible layer, and at least a second wall having a secondary structural layer and a second flexible layer. An axis of the 3D printed structure may intersect the first layer and the second layer and may intersect the primary structural layer and the secondary structural layer. The primary structural layer may have a first rigidity and the first flexible layer may have a second rigidity, the first rigidity being greater than the second rigidity.