stocking mask
From Longman Dictionary of Contemporary Englishstocking maskˈstocking ˌmask noun [countable] a stocking that someone wears over their face when they are doing something illegal such as robbing a bankExamples from the Corpusstocking mask• A woman in her mid forties was dragged into bushes by a man wearing a black stocking mask.• He then called the Haralson County sheriff and reported the incident, identifying Deering, despite the stocking mask he wore.