About this item 20” x 20.75” heating mat to accelerate and improve the success of seed starting and germination. Digital heat controller displays real-time mat temperature, which can be adjusted to exact levels. Eliminates the guesswork of determining heat levels to germinate any seed with no risk of scorching. Features innovative far-infrared film that warms faster and evenly distributes heat across the mat. Crafted with IP-67 quad-layer PVC that is flexible, resistant to wear and tear, and easy to wipe clean.