SALOMONXa Pro 3d, Men's Trail Running Shoes,Blue (Sky Diver/Navy Blazer/Hawaiian

Are the particular models gore Tex waterproof

Would it be ok to spray some waterproofing spray on it to make these a bit more resistant? Pros and cons of doing that?

If I wear an 11 in other Salomon shoes will I need to order a half size larger in these?

Does this come in a hiking boot version?