Instruct: Classify the given Amazon review as either positive or negative.
Query: Not 100% cotton.

The description says 100% cotton. When the product promptly arrived (thank you Amazon) the outer packaging said 75% cotton, 25% polyester. I opened the pack and the label inside the garment said the same thing. I can't wear polyester. If you want 100% cotton, don't buy these. I'm returning them.