The Crocs Hydro model is not only stylish; one of a kind, and lightweight, but it has multiple functions too. The croslite™ PCCR material helps to keep the shoe lightweight and buoyant. The waterproof neoprene that is also used means that this model of Crocs can be used on land as well as in the water by acting like a flipper. This model of Crocs also comes with an odor resistant and slip-resistant sole. Crocs Footwear are also anti-microbial and non-marking so they won’t hurt the feet when coming back from a well needed swim on those hot summer days. The 4 different themes make these shoes go with any swim suit or summer attire you choose. Men's Crocs sizes are: 4 – 13. Woman's Crocs sizes are: 6 – 12.