This flattering women's long steeve tee is amde with 3.7 oz. polyester/viscose jersey with 30 singles--65% poly 35% viscose (Athletic Heather is 52/48 polyester/viscose). The sleeves are made with 2x1 ribs for comfort and feature drop shoulder construction. The bottom hem of the shirt is curved to create a flattering drape and silhouette. This lightweight top is a great layering piece you can wear all year long!