Canvas white espadrilles with a jute sole.
The best way to protect the espadrilles is to scotch guard them or spray them with Crep before they get dirty (from Superga, Superbalist and Sportsmans Warehouse). This provides protection against dirt and water. Other than that a damp cloth can remove dirt from the upper sole. As for the jute sole, its better to not get them wet. Should you want to clean them I would recommend mixing a little laundry detergent with water in a cup and use an old tooth brush to gently brush the sole. Only if needed.
The Scotch Guard can be used on the jute sole and cotton upper.