Geogrids are polymeric (plastic) construction materials used to confine and stabilise granular fill materials to increase their load distribution capabilities while reducing its potential to deform under load. Geogrids have openings called apertures, which allow for rock particles to strike through. This action is known as particle interlocking, and it allows for rock to become confined within the aperture.

Geotextiles are construction materials made from woven or non-woven polymeric (plastic) fibers. They can be used to provide filtration and separation, which restrains soil from mixing with adjacent materials due to dynamic forces. Geotextiles cannot confine granular fill materials, since there are no apertures to achieve particle interlocking.