KimjunToddler Baby Hooded Down Jacket Boys Girls Kids Thicken Warm Winter Coat Outerwear 1-7t

The title says its a down jacket but the description says filler is cotton soft comfortable and warn?? Whuch is it??

Is it waterproof?

My son is 3 years old which size should i sleect ?

Is it supposed to come with the cuffs? I did not receive mines if so. Only the jacket.