Darkness is the absence of light, so we must not only speak of it or spread it, we must also become it. - Arielle Estoria. Become the light in our custom designed spectrum lightworker tank! This comfortable muscle tank is soft and flowy with low cut armholes for a relaxed look. • 65% polyester, 35% viscose • Athletic Heather is 52% polyester, 48% viscose • Black Heather is 80% rayon, 20% polyester • Fabric weight: 4.2 oz/y² (142 g/m²) • Relaxed fit • Low cut armholes • Curved bottom hem • Side seams • Blank product sourced from Nicaragua, Vietnam, Honduras, Guatemala, or the US