The thermal Exo dual layer balaclava features fabric layering technology that harnesses solar rays from the sun to amplifying the warming effect of the material up to 15 °F (10 °C). This functional, form fitting balaclava provides dual layer comfort and protection from the extreme weather conditions or can be worn with the outer layer down exposing the breathable mesh layer when less insulation is required. PIP® Winter Balaclava, Double Layer Thermal EXO, Universal Size, Black, Polyester/Spandex