This is a great tank top from River +Sky.  It is sustainably made in the USA.  An effortlessly chic style!  Elegant and classy, washed satin tank with front V-neckline. Perfect for work, play or date nights.  Easily paired with a cardigan or worn on its own.  Made in our soft lustrous satin.  The tank has a longer hemline in the back.  The material is stretchy and supersoft a knit jersey that has a cotton like weave to it. 
98% Lenzing Ecovero Viscose, 2% Spandex - Satin Weave
You can machine wash on delicate and lay flat to dry.