Generally I would say washing any footwear even fabric styles is not good. Most footwear is glued as well as stitched together in certain places, washing will make the glue perish and the shoes will come apart quicker than with normal wear. Also water can make suede and leather perish and spoil the finish. Finally some fabric suede and leather will shrink a bit changing the fit of the shoe. I would say wipe the surface with a damp cloth or even wet wipe but never submerse a shoe in water or use detergents.