The factor of surprise is what influences us to choose between a raincoat and a water-repellent jersey like the Shield.
If we know that we are going for a wet, fast, and aggressive ride, then the choice will be a Shield jersey that is close to the body and allows us to ride efficiently without resistance to the wind.

If the rain comes and goes, put a raincoat in the jersey pocket and use it when it appears. 
The Shield Jersey is the ultimate biking jersey for cold winter days. Made from waterproof, breathable, and windproof fabric, the Shield Jersey has three back pockets, a full front zipper, and a reflective panel with small holes to drain water. This best-case-scenario cycling top gives you the performance of a jacket with the weight and design of a jersey!