Cotton/Polyester Blend. 
These tanks are a fitted style. If you’d like a looser fit order one size larger. 
Features
60% combed ringspun cotton/40% polyester lightweight jersey
Shrinkage rate 3-5%
Tear-away label
Sizing Chart
                                 XS SM  L  XL 2XL
Body Width28303234  36 38
Body Length2727.5 2828.5. 29 29.5