The unique interlocking growbag mat system helps improve drainage and airflow minimising disease and pests whilst promoting healthy plant growth each mat measures 12cm high by 17cm wide by 22cm long with 2cm channels in the base to allow water to flowas each mat interlocks with its neighbour it is possible to make almost any shape required for planter or growbag use unique interlocking growbag mat system helps improve drainage and airflow minimises disease and pests