Skinners shoe socks are partly water resistant
The underside of the sock is waterproof.
This means that you can safely (and slowly) shuffle into a puddle of water 10 mm deep and not worry about getting your feet wet.
But don’t splash when you’re braving the puddle. Anything more than a shuffle might get your sock uppers wet.
If you’re running with your shoe socks and you step into a shallow puddle, chances are you won’t get wet, since the impact should displace the water too quickly for it to move up your foot. Also, while one leg is down, the other is arched up, so it’ll be out of the way of the splashing water.