The castelli flanders ls womens base layer is the winter base layer choice for riders who like to ride hard designed to wick moisture away from the body to keep you drier perforated mesh under the arms further aids breathability the flanders ls might actually be the only ls base layer you will ever need for your cycling needs this womeans long sleeve blayer is ideal for mild to cool weather cycling the focus is on keeping you dry so we39ve worked with multidenier polyester t