The ale prr tirreno long sleeve jersey features an ergonomic cut and fleeced stretchy fabric providing you with just the right amount of warmth and comfort you will also want a superb fit and aero performance even in these transitional months als prr tirreno jersey is cut to fit perfectly when in a racing position with no excess fabric to waste those vital watts through the use of the j stability system the jersey lays perfectly flat at the lower hem further improving aerodynamics