Castelli M Medio Base Layer Short-Sleeve

The Men's Medio Base Layer Short-Sleeve is the middle weight in Castelli's base layer range, which covers the conditions most riders spend most of the year in. Medium insulation pairs with strong moisture management, aimed at cool riding rather than the extremes at either end. The point of a base layer is to pull sweat off the skin so the jersey above can work, since a layer that holds moisture goes cold the instant the pace drops at the top of a climb. Short sleeves layer under a long-sleeve jersey without doubling fabric at the arm. Men's cut, worn next to the skin.