On the hottest days, we need every trick in the book to stay comfortable on the bike: frozen bidons, pre-soaked cap, frequent shade stops. Castelli's Active Cooling Baselayer adds to our arsenal of hot-weather techniques with innovative fabric to keep our temperature well-regulated through tough...

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With a high collar and sleeves that cover the entire wrist, the Castelli Bandito Wool Long-Sleeve Baselayer has you covered for riding in cold weather. With the superior warmth of Merino wool and the excellent moisture-wicking properties of recycled polyester, you are sure to feel warm, protected...

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Short-sleeve lightweight merino wool base layer to wear under a Gabba or jersey for cool rides.

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The Castelli Bandito Wool Sleeveless Baselayer keeps our core warm during those chilly but not-too-cold rides where a long-sleeve is too much.

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If you have a keen eye, you'll have noticed the lines running down the arms of our pro riders when they race TTs. These aero ribs are our Bolero sleeves. The ribs create aerodynamic trip strips, making our Aero Jerseys and San Remo Speedsuits even faster. We've incorporated this short-sleeve...

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Before you assume that all baselayers are created equal, take Castelli's Core Mesh 3 Short-Sleeve Baselayer out on a summer ride with an open mind. Rather than focusing on providing breathable insulation, a warm-weather baselayer like the Core Mesh 3 actually helps you stay cooler. The crew-neck...

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Castelli believes so much in the power of the fabric it uses to craft the Core Mesh 3 Sleeveless Baselayer that it deviated from its usual performance-related fabric monikers and named it Magic Mesh. Before you get skeptical about the fabric's otherworldly name, consider that the brand omitted...

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When we're training and racing during the spring months, the last thing we want is sweat held in fabric, keeping us too cold for the descent back down the canyon. Castelli's Core Seamless Baselayer uses a mix of polyester and polyproylene which wick moisture away from the skin better than...

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The seasons never slow you down, and your kit shouldn't either. That's why Castelli designed the Core Seamless Short-Sleeve Base Layer to keep you warm and dry all year long. The reimagined fabric blend repels moisture so you won't feel like a wet sponge, and the seamless construction has our...

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When there's a bite in the air, we kit up with the Flanders 2 Warm Long-Sleeve Base Layer. This top's silky warmth stops the chill from reaching our bones, while its mesh underarms and wicking prowess make sure we don't overheat.

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