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Castelli Base layers

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Find Clothing from Castelli for running and triathlon

Discover the pinnacle of athletic performance with Castelli, the legendary Italian brand engineered for victory. Born from a legacy of innovation in the demanding world of professional cycling, Castelli brings its obsession with speed, comfort, and aerodynamic advantage to the disciplines of running and triathlon. At Runnerinn, we are proud to present a curated collection of Castelli apparel designed to help you shatter your personal bests, whether you´re tackling a marathon, a sprint triathlon, or your daily training run. The iconic scorpion logo is more than a symbol; it´s a promise of uncompromising quality and a dedication to making you faster.

While Castelli´s triathlon suits and running jackets are masterpieces of technical design, the true foundation of your performance system begins with the layer closest to your skin. The Castelli collection of running and triathlon base layers is the unseen engine that drives your comfort and regulates your body´s microclimate. Forget everything you thought you knew about base layers; these are not just simple undershirts. They are sophisticated pieces of equipment, meticulously crafted to provide a tangible advantage in any weather condition.

A Castelli base layer acts as your personal climate control. Using advanced proprietary fabrics with hydrophilic and hydrophobic fibers, these garments masterfully wick moisture away from your skin. This rapid moisture transfer is critical for performance. In cool conditions, it prevents the chilling effect of trapped sweat, keeping you dry and warm. In the heat, it accelerates evaporative cooling, helping your body regulate its temperature more efficiently so you can push harder for longer. The result is a stable core temperature and significantly reduced energy waste.

The fit is nothing short of a second skin. Leveraging decades of experience in creating anatomical patterns for athletes in motion, Castelli base layers offer a seamless or near-seamless construction. This eliminates chafing and irritation, a crucial benefit during long-distance runs or the combined disciplines of a triathlon. The incredible stretch and recovery of the fabric mean you experience complete freedom of movement, with no restriction to your stride or form. Whether you choose a sleeveless, short-sleeve, or long-sleeve option, the base layer integrates perfectly beneath your running jersey or tri-suit, working in harmony with your outer layers to create a complete performance ecosystem.

For the dedicated runner and triathlete, investing in a Castelli base layer is investing in consistency, comfort, and speed. It is the first and most important decision you make when getting dressed for a race or a crucial training session. Elevate your performance from the inside out. Explore the range of Castelli running and triathlon apparel at Runnerinn and experience the difference that Italian engineering and a passion for performance can make

Castelli Base layers

Castelli Flanders 2 long sleeve base layer

Castelli Core Mesh 3 sleeveless base layer

Castelli Pro Mesh 2.0 sleeveless base layer

Castelli Pro Mesh 2.0 short sleeve base layer

Castelli Core short sleeve base layer

Castelli Medio long sleeve base layer

Castelli Prosecco Tech long sleeve base layer

Castelli Flanders 2 long sleeve base layer

Castelli Pro Mesh 2.0 short sleeve base layer

Castelli Flanders Warm long sleeve base layer

Castelli Core Mesh 3 short sleeve base layer

Castelli Merino long sleeve base layer

Castelli Flanders 2 long sleeve base layer

Castelli Medio short sleeve base layer

Castelli Pro Mesh 2.0 sleeveless base layer

Castelli Cold Days long sleeve base layer

Castelli Cold Days long sleeve base layer

Castelli Pro Mesh sleeveless base layer

Castelli Flanders 2 long sleeve base layer

Castelli Pro Mesh 2.0 short sleeve base layer

Castelli Core short sleeve base layer

Castelli Pro Mesh sleeveless base layer

Castelli Core Seamless long sleeve base layer

Castelli Active Cooling sleeveless base layer

Castelli Core Mesh 3 short sleeve base layer

Castelli Pro Mesh 2.0 sleeveless base layer

Castelli Medio long sleeve base layer

Castelli Cold Days long sleeve base layer

Castelli Team Sky Flanders long sleeve base layer

Castelli Pro Mesh 2.0 sleeveless base layer

Castelli Flanders Warm long sleeve base layer

Castelli Pro Mesh short sleeve base layer

Castelli Pro Mesh short sleeve base layer

Castelli Merino long sleeve base layer

Castelli Medio short sleeve base layer

Castelli Pro Mesh 2.0 short sleeve base layer

Castelli Bandito Wool long sleeve base layer

Castelli Pro Mesh sleeveless base layer

Castelli Flanders 2 long sleeve base layer

Castelli Prosecco Tech short sleeve base layer

Castelli Pro Mesh short sleeve base layer

Castelli Cold Days 2nd long sleeve base layer

Castelli Core Mesh 3 short sleeve base layer

Castelli Flanders Warm long sleeve base layer

Castelli Unlimited DT Base layer shorts

Castelli Cold Days 2nd long sleeve base layer

Castelli Tech short sleeve base layer

Castelli Flanders 2 long sleeve base layer

Castelli Pro Mesh sleeveless base layer

Castelli Meryl boxers

Castelli Core sleeveless base layer

Castelli Cold Days 2nd long sleeve base layer

Find Clothing from Castelli for running and triathlon