The Clean Water Corps, according to Websters....
 
This high quality regular fit tee has a casually elegant vibe. Additionally, the unbelievably soft tri-blend fabric makes it extremely comfortable - once put on, impossible to take off.
.: 50% polyester, 25% combed ringspun cotton, 25% rayon
.: Light Fabric (4.3 oz/yd² (146 g/m²))
.: Regular fit
.: Sewn-in label