Description of Chaco Zong Sandals - Women's If you define casual as a hike to the local farmers’ market or rock-hopping across a placid stream, the Zong calls your name. A thoughtful combination of free-heel convenience and Chaco's performance focused Z/2®, the Zong provides kick-on comfort while keeping your forefoot firmly engaged in the mission at hand (or foot). The EcoTread™ outsole is made from 25% recycled rubber, reducing our impact on the environment. EcoTread™ is available in charcoal and chocolate to complement our new midsole colors. Available on Zong, Hipthong and Wrapsody styles. Features: EcoTread footbed Soft polyester webbing Wrap-around toe design Classic basket weave