Firstly they are very comfortable, I mean they fit like a glove or should I say fit like a sock, the other is that the rubber outsole is strong enough that I can go outside to take something out of the car, fetching a newspaper, checking pets, even if there is heavy dew on the lawn or it has just rained, my feet will not get wet because the rubber shower is designed to expand in places where your foot gets wet would, but not go too far, reduce your comfort level.