HeatGear® SPORTSMASK Iso-Chill Mock Long Sleeve Exercising with a face mask just got a whole lot more convenient with this HeatGear® SPORTSMASK Iso-Chill Mock Long Sleeve ($60, originally $80). Both the face mask and the long sleeve shirt use Iso-Chill fabric to regulate your core temperature by dispersing your body heat as you workout. Image Source: underarmour.com HeatGear® SPORTSMASK Iso-Chill Mock Long Sleeve $60 from underarmour.com Buy Now