The application of 3D printing in the development of wearable devices has opened new opportunities for designing customized and adaptable solutions. A particularly promising area involves the development of complex structures and sustainable materials that combine flexibility and strength, with the ability to dynamically adapt to the stresses placed on the human limbs. This study proposes an innovative approach to the design of 3D-printed lattices that, while using rigid materials such as plastic polymers (PLA, ABS, and similar), effectively respond to variations in movement and pressure during use. The optimized design utilizes advanced geometries, ensuring reduced weight, proper force distribution, and an energy-efficient production process. In this way, the device remains flexible and able to adapt dynamically, while maintaining high structural strength and resistance to various stresses. The use of parametric models and simulation algorithms enables the design of lattices that deform in a controlled manner, improving user comfort and minimizing discomfort. Preliminary results suggest that such devices could be used in both therapeutic and everyday contexts, offering more comfortable, functional, and customizable solutions. This work explores how the integration of innovative materials and advanced design, typical of 3D printing, can transform the future of wearable devices, enhancing their adaptability to the natural movements of the human body.