Change out you door mat design anytime with the Sassafras Switch Mat by Evergreen. Sassafras mats are an easy way to dress up your doorstep with seasonal and everyday style. These interchangeable mats fit inside our Sassafras Mat Trays, sold separately. This mildew resistant insert is made of 88% rubber and 12% polyethylene terepthalate. Can also be used as stair treads by themselves without the tray. Spot clean with soap and water. Insert approximately 22"x10"x1/8"d.