The men's soft-style tank top has a slight taper under the arms. To avoid any pinching, this area has extra space built in. The garment is made from cotton - with polyester in the heather colors. There are no side seams - further increasing the fitting comfort. All bindings are the same fabric as the main body. The fine quality print will make your design look stunning. .: 100% Ringspun cotton (fiber content may vary for different colors) .: Light Fabric (4.5 oz/yd² (153 g/m²)) .: Sleeker fit .: Tear away label .: Runs true to size