Does anyone use these, they resemble a thin welly boot you pull over your riding boots? They are obviously going to be waterproof but how easy are they to pull on and off? I have tried various different types which vary from OK to dangerous because they get caught on the pegs. Putting them on inside sitting on a chair is one thing, outside with rain coming down is another. Incidentally all the riding boots I have had have been sold as waterproof, most are for a short time but none of them has been waterproof for any length of time.