Model may not be wearing the exact style of tank top.  
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