This Mat Tray features a border that creates a subtle flourishing pattern along the edges of this insert tray. This seasonal, switchable mat features a 16 x 28 inch space for Evergreen's coir doormats. This mat frame is made of recycled rubber and is mildew resistant, featuring a skid-resistant backing to help keep the mat in place. This mat is safe for indoor or outdoor use. For stains, simply spot clean with soap and warm water.