Castelli W Medio Base Layer Short-Sleeve

The Women's Medio Base Layer Short-Sleeve sits in the middle of Castelli's base layer range, which is where most riders actually need one. It carries medium insulation and strong moisture management, aimed at cool conditions rather than deep winter or midsummer. The job of a base layer is to move sweat off the skin so the jersey above can do its work, and a layer that holds moisture turns cold the moment the pace drops on a descent. Short sleeves keep it compatible under a long-sleeve jersey without doubling fabric at the arm. Women's cut, worn next to the skin.