I'll admit I was a happy girl to see Tailwind offer a singlet. Living in the south, short sleeves are an option just a few months out of the year then you need something cooler. I wore the singlet to a 10k. The temps were mid 70's, not too hot, 100% humidity so it was a sticky morning. Even with our endearing Mississippi weather and hard effort, I did not overheat in this singlet! It was wonderful!!! Great job, Tailwind!