1) Cover-up for a robbery 2) Gear on the slopes 3) Holdup cover-up 4) Item worn on the slopes 5) Protection for a bank job 6) Thing worn at Aspen 7) Type of wind shield 
A ski mask is a fine knitted hood similar to a balaclava, but also covering the face with holes for the eyes and mouth.
[n] - a woolen face mask to protect the face from cold while skiing
Synonymous with balaclava, this tight-fitting garment protects the head and neck from cold weather and often has openings for the eyes, nose, and mouth. Also used during bank robberies.
noun a woolen face mask to protect the face from cold while skiing