Common designs, such as the Crocs Cayman, have holes for ventilation, but the "Crocs Endeavor" have no vents (holes) and the "Professional" only at the sides. The " Islander Crocs " are a lace up shoe with leather around the ankle, sealing the top, but still with ventilation at the front of the shoe. The "All Terrain Crocs" have a lace up leather top and no vents. The Crocs Mammoth has synthetic fur lining and ventilation holes on top (none at sides to prevent water entering).
Also there are Bistro Crocs, designed for the foodservice industry with an added tread, claimed to conforms to the slip-resistance standards. There have been safety concerns about nurses getting infections from wearing crocs, and discussion of the ones with no holes being too hot. Obviously they should not be worn were there is a risk of injury from dropping something on your foot.
But if you just want the ordinary style (with holes), there are much cheaper ones available than the "Crocks" brand. These shoes are not for heavy duty use, but better than walking around the house in your socks.
|Top and Side
|Crocs Endeavor Shoe
|All Terrain Crocs