The Cat 5 Sea Wall is built tough from the top to bottom. Constructed of the heaviest materials available, it has a mid-wale and navy-style batter pilings installed on the face of the wall. It is piled high with rock-rip-rap and will stand up to virtually any conditions. The Cat 5 is for those who want to do it right the first time and be done. It should be the last wall you will ever have to build.