Reaching its 6th generation in Castelli's lineup the Prologo VI Long-Sleeve Full-Zip Jersey is ready for another year as the long-sleeve star in our kits. This year it features the construction that we've known with sleek slim fitting panels that wrap your muscles and the same drop-tail hem that you'll spot in Castelli's pro-level kits but with a new Punto fabric that gets right to the point with lightweight breathability. Punto offers significant horizontal stretch designed to offer a great fit while maintaining support. It features a remarkably soft hand and bio-ceramic nanoparticles that are added to a fused polymer -- which is a fancy way of saying that it both reflects scorching sun and traps heat within on days when you need a little extra warmth. Generously deep pockets sit lower on the back with plenty of space to stash your essentials and wraparound side panels offer a little ventilation in without letting too much of a frosty gust into the front.