Grodan's Coco-Dan Root Blanket contains two 2'x2' mats. Each mat is 1" thick made from organic coconut coir fibers. The mats feature matted coir for use in trays to protect plant roots, lightweight, meaning less expensive shipping than 4'x4' mats, ease of use with any tray and a handy size that is easy to store on shelves. To find a hydroponics retailer near you, go to http://www.hydrofarm.com/.