O'Neill Wetsuits Men's 24-7 Short Sleeve Crew polyester The 24/7 Tech Short Sleeve Shirt gives you maxium flexability and breathability. The 24/7 Tech Short Sleeve Shirt gives you maxium flexability and breathability. Quick Drying, Relaxed Comfortable Fit, 5oz Poly/Spandex. Machine washable, line dry, no bleach Mexico