One of a kind My National Park Adventure T-shirt. olors and sports grey include polyester. The shoulders have twill tape for improved durability. There are no side seams. The collar is made with ribbed knitting to prevent curling damage. 
.: 100% ring-spun cotton (fiber content may vary for different colors)
.: Light fabric (4.5 oz/yd² (153 g/m²))
.: Eurofit
.: Tear-away label
.: Runs true to size