It will keep your dog or cat, yes I said cat, warm, as the outside is velvet and the inside is microfiber. Don't worry about sizes as there is a whole chart to fit many sizes of dogs, and this thing is a snap to put on and take off as it has elastic and a four button closure.
My grandmother is a huge dog lover and would love something like this, so i think anyone who absolutely loves dogs would appreciate this.
My favorite thing about this halloween dog costume is the absolutely adorable soft poofy shark head.