Show your Penguin Water Systems pride with this stylish and soft T-Shirt. The unisex soft-style t-shirt puts a new spin on casual comfort. This tee is made from very soft materials and is 100% cotton for solid colors. Heather colors 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