I'm not the type to dole out five stars very often, but I must do that here.  These Crocs ROCK.  I was looking for something for the warmer weather for walking around in the spring muddy yard of mine, and these really do the trick.  You can just hose them off after.
Make sure you get this style with no vent holes in the sides if you're going to get them all messy, so you don't get dirty feet.  I like the navy blue, too, because it doesn't show the dirt.  They fit a little larger than whatever size you take, so order a half-size down, unless you like them roomy, like I do.  There are little nubbies inside the shoes that massage your bare feet, a pleasant surprise!
They are lightweight and easy to slip on, and I love the strap in the back to keep them on.  Highly recommended and I am going to buy another pair!