This long sleeve mid-weight base layer from Castelli has made moisture management a top priority. It has an outstanding ability to quickly wick moisture away from the skin, keeping you comfortable climb after climb. Perfect for cooler conditions & even high-intensity cold-weather rides when moisture management is a must, a hydrophilic Prosecco treatment efficiently spreads the moisture out over a larger surface area for quicker evaporation. Castelli have used different weights of fabric to construct their Prosecco base layer. A thinner layer is used in the areas covered by your shorts or bib straps & a thicker layer where you require more coverage, making sure you don’t have too much insulation where you don’t need it.