adidas Yeezy Foam Runner Stone Sage is a moulded foam slip-on variant. The Foam Runner's organic silhouette uses neither conventional lacing nor a layered upper; its body is formed as a perforated foam moulding. A foam mould creates upper and base. The outsole continues the wavy lines, while the foot rests directly in moulded foam. Cuts open the space around the foot. A contoured footbed and light foam keep the construction simple for casual wear.