GH CocoTek Coco Mat 4 ft x 4 ft x 1 inCocoTek Grow mats are made from a strong weave containing 100% organic coconut fiber and natural rubber. Roots will thrive in this natural media. These mats can be easily cut to fit any size application and are designed to lay underneath baskets, slabs and cubes. Roots will grow under mats where moisture remains in a hydroponic tray between flood cycles protecting them from drying out.