The Keen SOLR sandal is optimized for water-use (SOLR stands for Sea Ocean Lake River. It has serious amphibious grip, and webbing made from recycled plastic bottles. It features a low-profile design is lightweight and flexible for improved ground contact. Underfoot is an EVA midsole for lightweight cushioning. This sandal is quick-dry lining for active use and the non-marking rubber outsole leaves no trace.