Fit, fabric and functionality. This tank top checks all the boxes.Discover the Striped Sleeveless Sweater by Heartloom, a chic and transitional piece perfect for the end of summer. This ribbed knit top features a racerback silhouette and a flattering mockneck design. With a composition of 64% Viscose, 18% Nylon, and 18% Polyester, it offers a soft and fitted feel. Closure - Pull on.