Most of consumer products during their processing are experiencing the state of biaxial deformation. Especially this can be said about the products made of sheet materials which during their manufacturing processes must obtain spatial shapes. Upholstered furniture production can be a good example of the industry which needs efficient solutions of such problems. On the other hand performance behaviour of applied materials must be simulated in a sufficiently realistic way. Up-to-date questions of fitting different sheet materials to Three-dimensional surface are analysed from the standpoint of the mechanical properties which are mainly defined by uniaxial tests. Besides, unsolved problems exist in describing the limits of external forces and acting during product processing, handling and consumption. Up till nowadays researches are treating this problem in a different way. Thus the aim of this investigation was to find out the relationships between the parameters of uniaxial mechanical properties and biaxial behaviour of upholstery materials (multilayer woven and knitted materials, leather and their fused systems) at different low levels, i.e. external processing and handling loads of different velocities and to define the effect of tested materials anisotropy level upon their biaxial performance. The object of the investigation was nine types of upholstery materials different in their structure.