1. A multi-mode hand covering for a person, comprising: an elongate tubular portion having an inner space, a hand insertion end into which a person's hand may be inserted and a forward terminal end;
an opening in said terminal end through which said person's hand may be passed;
a palm side of said tube corresponding to a palm of said inserted hand;
a back side of said tube corresponding to a back side of said inserted hand;
a thumb enclosure extending outwardly from the palm side and communicating with said inner space for enclosing said person's thumb; and
an exterior pocket extending generally from said terminal end to a pocket opening generally spanning said palm side proximate said thumb enclosure;
wherein said pocket is operable between a palm position wherein said terminal end opening is open to the atmosphere for passage of said person's hand therethrough for exposure thereof, and wherein said thumb enclosure is positioned within said pocket, and a back position covering said terminal end opening whereby said hand is fully covered; and
an internal pocket having a generally upper opening, said pocket within said inner space for selectably enclosing at least a portion of said hand when said terminal end is open.