If you are getting serious about cycling, a good jersey is a must. Jerseys are snug-fitting so that they don't flap in the wind and create unwanted aerodynamic drag. They are also moisture-wicking so that you stay nice and cool on the bike. Riding a bike in a soaking wet t-shirt is not fun, trust us. In addition, cycling jerseys have pockets on the back to hold all of your ride essentials: snacks, gels, mini-pump, multi-tool, water bottles, etc.