SperryWomen's Saltwater Rain Boot

Is there any arch support in these? I have bad feet and usually wear Vionic shoes but love the look of these

Is the upper part, the fabric part waterproof? Has anyone tested?

Does the leather upper of this duck boot need to be waterproofed before wearing?

Are these good for snow too or just rain? Will they hold up well after being out in the rain all day or snowing and sledding all day?Busy kids!