This master’s thesis focuses on bistable auxetic structures, which are characterized by a negative Poisson’s ratio and the ability to remain in two stable equilibrium states. The main objective of the thesis was the design, manufacturing, and experimental testing of structures based on a modified square rotating unit cell, with an emphasis on compa ring their real mechanical behaviour with the results of numerical modelling during the transition between two stable states. The theoretical part presents a literature review focused on the operating principles of bistable auxetic structures, their applications, ma nufacturing technologies, and approaches to numerical modelling. In the practical part, a sensitivity analysis of the geometric and material parameters was performed using the SHAP method with respect to the energy barrier and the extensibility of the unit cells. The obtained results made it possible to quantify the influence and behavioural character of each parameter. Based on these findings, experimental specimens were designed and manufactured using additive manufacturing technology. An important result of the thesis was the development of a finite element model of the entire structure. Previous conver gence issues were eliminated by introducing a hyperelastic material model calibrated using data from a uniaxial tensile test. Numerical simulations confirmed the sequential opening of individual rows of unit cells, and validation demonstrated high agreement between experimental measurements and the numerical model in predicting the total extensibility of the structure in the second stable state, with a maximum deviation of 5.8 %. Differences in the maximum force were mainly caused by simplifications in the numerical model and by manufacturing inaccuracies between the ideal and the actual fabricated geometry. A major technological contribution of the thesis was the design and manufacturing of multi material structures. By combining rigid and elastic materials, these structures enabled targeted modification of the critical neck region, reduced the influence of manufacturing inaccuracies, and increased their effective extensibility.