First Coastal designs, and constructs Geo Sand Cubes and Sand Filled Geotextiles Structures and Restoration Projects as protection alternative for Long Island's coastline.

A sand filled geotextile structure consists of a series of polyethylene fabric bags or tubes that run the length of the shoreline. These Geo Sand-Cube, tubes or bags are filled with sand and placed on fabric bedding along the base of the eroded dune/bluff to deter undermining from moderate wave attack. This structure is intended to provide protection that is slightly greater than a natural dune would provide. These structures are a non-permanent "softer" alternative to traditional rock or steel shore protection structures. Because of its overall limited height, the structure may be subject to rolling, undermining and overtopping during severe wave attack, thus it's not intended for permanent protection during prolonged intense storms.

After Installation, the sand filled tube or tubes are covered with dune fill, then the new dune is planted with beach grass and sand fence is erected along the seaward base.