Heat Factory Multi-Function Head Piece for use Hand Warmers Fleece Specially designed to accommodate Heat Factory warmers, with pockets on the chest, back and top of the head Elastic straps enable you to wear the head piece in multiple positions: full hood, face mask or neck gaiter Double layer mouthpiece; true Lycra trim One size fits most Includes 2 Heat Factory Hand Warmers; warmers last up to 10 hours each