The YZY Foam RNR 'Stone Sage', which is made in the USA, features injected eva foam to provide lightweight durability. This model is made using algae harvesting technology that helps to keep lakes clean. The soft top layer in the footbed offers immediate step in comfort. The strategically mapped vents around the foot provide air flow and breathability. Additionally, the YZY Foam RNR will usher in a new box construction that requires less material, which leads to less cardboard material waste.