Description of Chaco Z1 Sandal with Colorado Sole Whether you are strolling along the river by the campsite or heading to the farmer's market, the Z1 is an ideal choice. Experience the ultimate in traction, comfort and support with the Chaco Z1 Sandal. Move forward in comfort and style with the Chaco Z1 Sandal. Features: Soft, polyester pull-through adjustable straps are carefully positioned for comfort and support. Durable polyurethane footbeds feature Chaco's BioCentric™ contour for biomechanical fit and comfort. High-quality outsoles by Vibram® and 5.10® Simple, secure and very comfortable, Z/1’s open toe design allows year-round use with socks or booties.