Described is a permeable multi-axial grid netting comprising a plurality of first and second threads (4, 5) which are interlaced and superposed to form a grid (2) whose meshes (3) present an irregular and/or regular closed broken line (6); each first and second thread (4, 5) comprises a plurality of strands (7) defined by thin, elongate elements placed side by side and joined to each other by impregnation with an adhesive resin (8).