Everybody loves a great cotton tee, right? Sure, until it gets sweaty or wet. The best workout or casual t-shirts have long employed a cotton-polyester blend for the best combination of comfort, feel, lighter weight and at least some moisture management. The Cervelo Stripe T-shirt and runs with a 60% cotton, 40% polyester blend, which is a perfect balance. The cotton yarn has also been treated to resist moisture and more closely align with the performance of the polyester fibers. You wouldn't expect the technical geniuses from Cervelo to offer a simple cotton tee, would you?