When the castelli climbers 20 short sleeve jersey was created castelli primarily focused on making it light for the big alpine climbs as well as cool for hot days a real tour de france jersey if there ever was one but they didnt want to completely ignore aerodynamics so they used patterning similar to the aero race 51 jersey which they knew was fast the resulting jersey is extremely cool and light and instantly became a favourite with castellis pro riders the surprise was when they p