The Stealth T1 was specifically designed for Tri events and was the talk of the town at Ironman Hawaii last year. We felt the need to add the Stealth T1 to our Castelli offerings because we love the product. It obviously can be worn for its intended purpose on the Tri/TT bike or you use it as a light and comfortable cycling jersey with exceptional aerodynamics, wicking, breathability and airflow.
Borrowing from Castelli's aerodynamic designs, the front of the T1 is constructed from Velocity fabric which is optimized for aerodynamics. The rear panel is Velocity Mesh which like the standard Velocity, is highly aero, except it breaths far better. Both Velocity's offer excellent wicking and dry rapidly. They are also lightweight, bringing the top in at a feathery 118 grams. As you would expect, the T1 has an anatomical fit with little to no gathering of excess material.
Castelli engineers their triathlon race wear so you can ride faster and maximize performance and the T1 top claims to take 3 minutes off a 5 hour ironman leg. Some of the technical details include a full front zip for maximum venting options. There are two back pockets located at the seams for more aerodynamic storage. Ingenious micro clip hooks hold the jersey in place in the TT position.