The tree spirals are manufactured using 100% recycled PVC, and offers a life expectancy of at least 4 growing seasons. Tree spiral guards are a low cost option providing protection for young trees, new hedge row planting, stemmed seedling and transplants. The tree spiral guards offer tree and hedge planting protection against browsing animals such as rabbit, hare, sheep and deer, and also chemicals. These tree spirals have the ability to grow with the trees as they mature, avoiding the risk of strangulation of the tree, are available with ventilation holes, which reduces the effect of mildew and leaf burn. We recommend using canes and rabbit guards if you have a known problem with rabbits, hares or have sheep where the young plants will be planted.