All we can say is that we don't use cotton. Cotton sucks and causes the collar to wrinkle and the shirt to shrink. We use a proprietary blend that we specifically created for movement, durability, and sweat resistance. Our shirts have the perfect amount of stretch and comfort that otherbutton downsdon't. Our shirts are completely custom cut and sewn from the ground up using our measurements, patterns, buttons, tags, and are not printed on demand.