TerraMattresses™ is a corrosion free polymer based erosion control system designed to replace conventional rip-raps or wet stone pitching. This system is often used on slopes to construct boulder or soil in-filled semi-rigid crates and large bags to prevent water front induced erosion. The integral behaviour and monolithic containment of the structure provides an efficient erosion control tool for protection against flash floods, up to moderate wave attacks and run-ups.