This project is aimed at studying the new class of materials defined "crystalline elastomers", which are innovative polyolefin-based elastomers that present increased and tailored stiffness, with respect to conventional elastomers, thanks to the presence of non-negligible level of crystallinity. These materials are characterized by a combination of mechanical properties typical of crystalline polymers (high mechanical strength and stiffness) and of elastomers (ease of deformability, ductility and perfect elasticity)