Laced Rubber Runners - Black3D printed rubber mules. These mules are made entirely from a fully recyclable and highly flexible polyurethane rubber. 3D printing reduces material usage when compared to traditional injection moulding. It is normal for printing results to not be entirely perfect. Small defects contribute to the aesthetic of the product and do not affect its functionality. SPLITSize conversion chart: SPLITThis item is produced on a made to order basis and will be