The Smissmas Caribou
This item could be obtained by crafting the Steam Holiday Sale 2013 badge.
It resembles 'Randolph the Blood-Nosed Caribou', an even more rare and valuable item.
There are 236 known instances of this item.
Source
The Smissmas Caribou
Team Fortress 2 Limited Level 80 Hat
Granted by crafting the Steam Holiday Sale 2013 badge.