It is knowned that the mooses are living in Alaska..in cold inviroments but they don't have any nervs running through their horns it it doesn't keep warm. Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image! Please Register or Log in to view the hidden image!
you can read the whole thing here: http://www.exploratorium.edu/xref/exhibits/antlers.html but here are some snip its that answer you question: so, in short, they are not horns, and it is called velvet.
p.s. there is a wonderful place where you can find information of all types, here is a link: www.google.com