Runners.The Cloudstratus by On Running is a high performance shoe, ideal for road racing. The particular TPU-reinforced breathable mesh structure offers great elasticity and lightness to the shoe, while the patented double Cloudtec sole guarantees soft cushioning and excellent stability.upper in breathable and antimicrobial meshheat-sealed TPU insertsreflective logofabric interior and insolemetal eyelets padded tonguequick lacingreinforced heeldouble CloudTec rubber sole