Not 100% Cotton on Gray Shirts

Previously I had a terrific experience with Sticker Mule with great turn-around and soft 100% cotton shirts. Unfortunately, this last order with gray shirts was not the 100% Cotton as advertised. Replaced by a lower quality shirt of 90 % cotton/ 10 % polyester. Still will use them again but I do double check to make sure it's the softer 100% cotton shirt.