Abstract: The gun mitten is intended for use with a long gun (shotgun, rifle, etc.,) and comprises a body formed of flexible material such as synthetic fabric or the like which may be quilted or otherwise enhanced with insulating material to provide a substantially weatherproof enclosure for the stock, grip, trigger and trigger guard area of the gun while also enclosing the shooter's hand and forearm. The body is a bifurcated unit made up of a pair of angularly related sleeves, one for the gun stock, etc. and the other for the shooter's hand and forearm. The sleeves meet at a junction in the area of the trigger and this junction opens to the insulated chamber or pocket formed in the trigger area for access of the shooter's hand and fingers to the grip and trigger.