Our EcoDecors extra large teak spa shower mat provides elegant functionality in our out of the shower. It has a non slip rubber track on the back to prevent the mat from shifting on the shower floor. Slats provide space for ease of water drainage through the floor. Teak is naturally water, mold, and mildew resistant due to its natural density and high oil content. It has been the wood of choice for hundreds of years of luxury boat builders. This natural resistance has been supplemented by using our proprietary DecoTeak stain which is a deep penetrating stain with added mold, mildew, and fungus inhibitors. It provides the ability for this teak mat to be used outdoors as well as indoors.