Geosynthetics requirement for basal reinforcement are linked to the application and shall be written based on data characteristics. Thus, the choice of the product shall not be driven by the production technology, but only by the conformity of this product to the characteristics established during the design phase. Indeed, the characteristics depend on the manufacturing process but two products could achieve similar performance and behavior in the structure, even if they look like totally different. That means that the geosynthetic type shall never be a selection criterion. For example, geogrids which are often associated to the reinforcement function are not the unique solution and wovens or composites products may also be used as long as their properties fulfill the requirement. The geosynthetic needs for the reinforcement function are studied as well as their impact on the behaviour of structures where basal reinforcement is involved.