The al r ev1 master short sleeve cycling jersey is designed for competitive races with a professional ergonomic cut constructed with shaped giro sleeves and flat seams for comfort the jersey is designed for optimal aerodynamic performance crafted from high performance material the full zip jersey features a bio ceramic rib 130 back to protect from harmful uva uvb rays and keep your body at the ideal temperature the jersey also releases fir rays to enhance the bodys microcirculatory sy