The first running shoe from Porsche Design: the ultra-light Porsche Design RCT NITRO® Runner combines sustainability and forward momentum. The innovative NITRO FOAM® in the sole provides excellent responsiveness and perfectly soft cushioning while weighing just 390 grams (in size 42). To give you maximum support during tough running sessions, the mesh upper has been partially reinforced and original carbon-fiber compound has been incorporated into the heel area for support. "Heel lock" lacing holds the laces securely together. Design meets function: characteristic of Porsche Design. No less important: the sustainability aspect. The running shoe's upper is made from recycled First Mile polyester, helping reduce waste in landfills and oceans. Lightness, support, sustainable style: a running shoe can do no more.