Bruno MarcMen's Casual Slip-on Shoes Warm Loafers for Men Winter Boots

I wear a 9.5 or ten depending on the manufacturer, what size should I get for these shoes?

Are they water resistant

When will you have the 10 1/2 in stock in the men's casual slip-on winter boot in grey?

It says that these shoes are for warm winter wear, does anyone believe that this is true. Plus, if I wear a 9.5, what size should I get?