CASTELLI Men’s Core Mesh 3 Short Sleeve, Ultra-Lightweight Moisture-Wicking Base Layer for Hot-Weather Road Cycling

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 baselayer fits like a second skin, which allows its polyester mesh fabric to instantly pull moisture off your skin to keep you dry and cool as you heat up under an unforgiving sun and tempo. By sitting between your skin and your jersey, this fast-drying layer prevents damp fabric from chilling you when the breeze picks up in spring or weighing you down on hot summer days, regulating your temperature better than your skin alone.

• SIZING: Castelli products have a close-to-the-body fit to maximize aerodynamics and performance. For a less compressive feel, or if your measurements fall between sizes, we recommend that you size up.
• IDEAL FOR: Cyclists demanding maximum cooling and moisture management during intense summer rides, races, and indoor training sessions. This ultra-lightweight mesh base layer keeps your core dry and comfortable under a cycling jersey. Temperature: 20°C - 30°C / 68°F - 86°F. Weight: 118 g.
• MAXIMUM BREATHABILITY & COOLING: The open Magic Mesh fabric design enhances airflow between your skin and outer layer, preventing overheating on long climbs or turbo trainer sessions. Ideal for road cycling, gravel riding, or triathlon training in hot climates.
• FEATHERWEIGHT PERFORMANCE DESIGN: Built with minimalist lightweight construction and reduced seams for zero irritation, this Castelli base layer fits perfectly under any race or training jersey—ensuring unrestricted movement and second-skin comfort.
• ADVANCED MOISTURE-WICKING FABRIC: Crafted from a 90% polyester / 10% elastane blend, it efficiently wicks sweat away from your body to keep you dry during long summer rides. A must-have cycling undershirt for endurance athletes seeking pro-level temperature regulation.