One of the biggest contributors of human scent is the head and neck area. Some the major factors are breath, hair, mouth odors, and odors from the top of the head and air escaping through the neck from the chest area. It is recommended that serious hunters purchase two headcoversas the large amount of odor fills this critical area quicker than the other, less odor-producing, zones. The Scent-Lok TimberFleece Facemask has excellent face and neck protection for any cool weather hunt. Mask can be dropped for easy calling.