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Base layers are designed to regulate your body temperature, which is key for optimizing performance and comfort. This first layer wicks away sweat and moisture from your skin, keeping you to cool on hot days and warmer on cold days.

Secondly, our base layers are made from comfortable, lightweight and breathable materials that help reduce friction and chafing. Gone are the days of irritation from jersey seams or rough materials rubbing against your skin.  With a Castelli base layer, you can ride longer and more comfortably, without worrying about discomfort or irritation.

Castelli base layers are designed so you can move freely and without restriction while riding. The soft and stretchy materials never hinder your natural position on the bike and serve to improve the overall experience you have when you're out riding.

For the best on bike experience, investing in one of our high-quality cycling base layers is a no-brainer. Performance starts with comfort and over heating or losing too much body heat is the first step to a bad riding experience. Try our cycling specific base layers and see the difference years of experience and research makes for your riding.


When choosing your summer base layer, there are certain features you want to look for. It needs to be comfortable, manage moisture well, it should be light and the fit should be snug next to the skin.
Possibly the most important attribute in a base layer. A good cycling base layer should be comfortable to wear, especially during long rides. In practice, this means it should be made with breathable and quick-drying materials, able to manage moisture, regulate body temperature and reduce friction. In addition, features such as right fit, sun protection, antibacterial properties and odor-resistant technology are all important for added comfort and performance. You'll find all of these in Castelli summer cycling base layers.
Cycling can be a sweaty activity. For this reason, proper moisture management is crucial in cycling base layers due to the heat and sweat generated during physical exertion. Inadequate moisture control can lead to discomfort and chafing, particularly in sensitive areas. A base layer with effective moisture-wicking properties can prevent these issues by transporting sweat away from the skin, keeping the body cool and dry. Through polyester and polypropylene yarns or mesh construction, our base layers can effectively wick moisture away from the skin. An example is our new Miracolo Wool.
A lightweight cycling base layer is important for enhancing the comfort and performance of a cyclist. It allows for better breathability and moisture management, regulating body temperature. A lightweight base layer made of moisture-wicking materials pulls sweat away from the skin, allowing it to evaporate easily, keeping the cyclist cool, dry, and comfortable. It is also more flexible and form-fitting, reducing bulkiness or weight, improving aerodynamics and mobility. Overall, a lightweight cycling base layer helps manage moisture, regulate body temperature, and improve mobility. The Magic Mesh 90% polyester, 10% Elastane wicking fabric makes the Core Mesh 3 base layer our lightest base layer.
A well-fitting cycling base layer is essential for comfort, performance, and health. It should fit snugly, hug the skin, and cover the lower back. A proper fit prevents chafing and discomfort, avoids overheating and regulates body temperature. If the base layer is too loose, it creates friction and irritation, while if it's too tight, it limits movement and breathing. Our well-fitting base layers help you stay comfortable, dry, and perform at your best while riding.
Breathability is crucial in a cycling base layer, especially during the warm months. It helps regulate body temperature by allowing air to circulate around the body and sweat to evaporate, preventing overheating. Breathable fabrics also prevent discomfort by keeping you dry during a ride. Improved performance is another benefit of a breathable base layer, as it prevents overheating, which can lead to fatigue and decreased performance. Lastly, breathable fabrics help prevent odor buildup by minimizing the amount of bacteria that can grow and cause unpleasant smells. Our Active Cooling Sleeveless, with cooling technology of its Polartec® fabric, offers extraordinary breathability cooling you on the hottest days.
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