More than meets the eye - the Shield jersey looks like a classic race-fit jacket, cut slightly looser than PNS jerseys to allow for layering, but snug and with enough stretch built in not to flap around in the wind.
But the real star here is the fabric, which actually adapts to keep you at the optimum temperature in different conditions:
Designed for continuous year-round use, the Shield Program is comprised of gilets and jackets which effectively ensure the optimum body climate in all conditions. Created with biomimetic Schoeller® textiles, the c_change® membrane reacts to intense temperature changes and moisture development. At higher temperatures the polymer structure opens, allowing excess heat and moisture to escape the body. In the cold, or as the body is less active, the polymer structure contracts and keeps heat close to the body, effectively preventing shivering or chilling.