Christmas jumper...!

What could be more traditional than a christmas jumper?
This little beauty was bought for me by my brother and his family (cheers guys!), and is, in the words of our friends 12yr old son, "sick" (that means good for all you not down with the kids!). I think it's pretty suave and am gonna wear it in the hope to be likewise by association.
I welcome your honest kind and generous opinions... ;)