Skins Tri400 M Sleeveless Top Swim, bike, run, and fly past your competitors in SKINS TRI400 Sleeveless Top with Front Zip. With strategically placed high-tech slimy fabric that reduces drag in the water and dries quickly on land, our sleeveless top will power you through training sessions to race day, every leg of the way. The Skins TRI400 series is constructed using "400Fit" technology for a more comfortable feeling while you swim, bike or swim. Dynamic Gradient Compression helps accelerate your blood flow to provide more oxygen to your active muscles. Flatlock seams guarantee reduced drag in the water, optimal compression, fit, muscle support and comfort. The fabric panels are positioned to reduce water resistance, thereby improving your performance in the water. Ultralight Elastic Interface® specially designed for triathletes looking for maximum comfort and performance. Carbon-based panels are positioned between the thighs, thereby reducing friction, making running m