Here's a closer look at the material. Scroll down to find the answer.
Answer: A 50-50 Polyester-Cotton blend. The photo was of the sleeves of this year's Science Bowl T-shirts laid out in preparation for the high school event which took place on Jan. 25. Between the high school and middle school Science Bowls it takes 350 T-shirts to clothe the volunteers and teams that make it to the Sweet 16!