Product Detail Proprietary PVC co-polymer blend Mallet and utility knife are all that is required to install Patented air flow-through design helps prevent mold and mildew Allows dirt and liquid to flow through the tile Anti-slip and anti-fatigue properties . The "Norsk-Stor NSMPVN20BLK Vented Multi-Purpose PVC Flooring, Black, 20-Pack" is best product for you. We recommended Norsk-Stor NSMPVN20BLK Vented Multi-Purpose PVC Flooring, Black, 20-Pack