PRODUCT FEATURESExtreme comfort in a thermal short, offering just the right level of warmth for fall and spring ridesCastelli Thermoflex fleece 80% nylon / 20% elastane fabric for extra warmth with maximum stretch and comfortMinimal-seam construction Raw-cut leg endings finish just above kneeDrop Tail bib strap system for bathroom breaks without need to remove jersey or jacketProgetto X2 Air seamless seat pad.