Woven Mesh Gabion Baskets or Gabion Cages and mattresses are purpose designed stone filled wire mesh baskets or cages for use as retaining structures. They are also sometimes referred to as just stone filled bastions, stone cages or baskets. Gabion baskets are an economical, environmental and established solution for structural retaining walls and coastal defences. Designed like for like, gabions are hard to beat on cost and aesthetics when compared to other established retaining wall systems such as reinforced concrete and masonry. This is particularly so for low to medium height retaining walls.