You wont get the Shaft wearing this shirt from Mammoth, California since it puts a new spin on casual comfort. Made from very soft materials, tee is 100% cotton for solid colors. Heathered colors and sports grey have some polyester. The shoulders have twill tape for improved durability. There are no side seams. 
.: 100% ring-spun cotton, and some colors have polyester
.: Light fabric 
.: Sizes run true