ZERØGRAND All-Day Trainer Slip-OnProprietary Stitchlite knit upper for comfort and breathability. Internal heel padding prevents heel slip and provides added comfort. TPU heel chassis provides extra heel support and stability. 3. ZERGRAND Motion tooling and last provide a wider forefoot base and increased stability. EVA foam provides lightweight cushioning and comfort. Forefoot flex grooves provide increased flexibility. A lightweight rubber outsole provides increased traction and