There are some garment colors in our 100% cotton line that contain a small amount of polyester.
The Ash color contains 1% polyester. The Sports Grey color contains 10% polyester. The Dark Heather contains up to 50% polyester. The polyester is there to properly produce the variegated colors. This is caused by the way the dye works on cotton as opposed to polyester.
The label will state a polyester content but the fabric is heavier than the traditional 50/50 and uses the Ultra Cotton brand garment label.