3D printing3D printing with filament has advanced considerably, allowing the manufacture of complex objects with high precision. However, printing flexible materials represents a challenge due to the strength and high deformation characteristics of these materials. This study proposes the development of a reinforcement for the EVA polymerPolymers, using ramie fiber, in order to facilitate 3D printing3D printing using the FDM method, maintaining the flexibility of the material. The hot melt extrusion process was carried out in a mini-extruder, where the polymersPolymers were mixed in different proportions with reinforcement with natural fiberNatural fibers at 10%, 20%, and 30%. The results showed variations in the apparent density and tensile strength of the different polymerPolymers mixtures, at a speed of 500.0 mm/min and a capacity of 1 kN. The data obtained in the work were analyzed statistically and significant differences could be observed in the mechanical tensile test.