The Hydro Sport water trainers from Ryka aren't afraid to get a little wet. Great for water aerobics. Synthetic and mesh upper in a hybrid water fitness trainer. Speed lace system with toggle for easy on/off, padded tongue and collar. Webbing midfoot cage provides medial and lateral support. Textile lining, cushioning removable Nitracel insole. Compression molded EVA midsole with drainage ports. Sticky rubber outsole with drainage ports.