I will say the only con to these shoes are they can make your feet a little sweaty. However they are water shoes and wash so easily. Washing them in the washer with mild soap and letting them air dry in the sun does not deteriorate the integrity of this shoe. My son will be 4 and has owned a pair of Keen sandals for every summer since learning to walk. I love the durability of Keen shoes (I wear them too) and the closed toe, perfect for the playground and hiking. Plus I feel we get a lot more support for our feet than we would with any other sandal.