Baselayers are important for a variety of reasons, the Castelli Prosecco Tech Long Sleeve Base Layer is all about keeping you dry in cool weather.It achieves this by featuring a body mapping construction to provide the best wicking and correct levels of insulation right where you need it. The main body is made from a rib-knit fabric with Prosecco hydrophilic treatment. The ribbing helps trap air against your skin for optimum temperature regulation, while the hydrophilic treatment helps whip water away keeping you dry even when the efforts intensify. For even insulation across your upper body, the Prosecco Tech uses PrimaLoft® panels at the waist and back. This thinner material means you don’t overheat where you have multiple layers from your bib tights and jersey. A crew neck fits neatly under short-collared jerseys.100% polyester proprietary stretch rib-knit fabric for the main bodyProsecco hydrophilic treatment for maximum wickingPrimaLoft® panels at waist and back where bib tight covers upper body for even insulationCrew neck closure to fit under short-collared jerseys6° – 16°C / 43° – 61°FWeight: 151g (L)