The kids heavy cotton tee is perfect for everyday use. The fabric is 100% cotton for solid colors. Polyester is included for heather-color variants. These fabrics are prime materials for printing. The shoulders have twill tape for improved durability. The collar is curl resistant due to ribbed knitting. There are no seams along the sides. .: Material: 100% cotton (fiber content may vary for different colors) .: Midweight fabric (5.3 oz/yd² (180 g/m²)) .: Classic fit .: Tear-away label .: Runs true to size