The FP Movement Retro Rider 1/2-Zip Top is a half-zip top with a mock neck that adds coverage, cut from soft, breathable 100% polyester for high-energy movement. The half-zip opens to adjust the neckline as the effort changes. What Our Gearhead(R) Experts Are Saying:"The thumbhole cuffs hold the sleeves down over my wrists, so they don't ride up while I'm moving through a workout. That's why I reach for this top when I know I'll be on the move."