Castelli T1: stealth Top
With its unique combination of technical fabrics and sophisticated construction, the Castelli T1: stealth Top offers triathletes an almost unprecedented level of aero-performance without sacrificing breathability and comfort. Castelli achieves this with Velocity fabric on the front and a highly breathable Velocity Mesh fabric on the back and shoulders. This wind-tunnel proven combination helps shave up to three minutes on a typical five-hour Ironman bike leg. For increased comfort during warm conditions, Castelli uses a full-length front zip for easy venting and adds a UPF sun-protection level of 16+. Finally, a silicone gripper elastic at the hem prevents the top from shifting even when athletes are in the most extreme aero positions.