Leading the way in technology advancements, Zoot is using CARBON fabric in the Ultra Tri Aero Short Sleeve Jersey for the most cutting edge performance benefits. CARBON fabric reduces heat build-up to help regulate body temperature during intense exercise. CARBON fabric also has anti-microbial effects and incredible moisture wicking to keep you dry and comfortable for the long haul. The added benefit of UPF 50+ will protect you from the sun. BYOB - bring your own bra for personal comfort. The aerodynamic advantages of the Aero Short Sleeve Jersey are perfect for race day.
For reference, I'm 5'7" and 134lbs. I wanted the two piece kit mostly for training as I LOVE the one piece speedsuit. I did find the small top to be a little more snug which would be perfect for racing as it would be more aero. Ultimately I went with the medium size mostly for comfort reasons. I stay nice and cool despite the dark colors. The material is amazing. Fit is perfect. I just love the colors.