Castelli Pro Mesh M Short Sleeve Base Layer - Black
Apparel
Castelli Pro Mesh M Short Sleeve Base Layer - Black
Castelli Pro Mesh M Short Sleeve Base Layer - Black
The Castelli Pro Mesh M Short Sleeve Base Layer in Black is the hot-weather base layer built around maximum ventilation rather than warmth, using an open mesh construction that sits against the skin to create an air gap between your body and your jersey. Read the overview
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Overview
What Does the Castelli Pro Mesh M Short Sleeve Base Layer in Black Actually Do?
The Castelli Pro Mesh M Short Sleeve Base Layer in Black is the hot-weather base layer built around maximum ventilation rather than warmth, using an open mesh construction that sits against the skin to create an air gap between your body and your jersey. That air gap is the mechanism that makes a mesh base layer cooler than riding without one in high summer heat, allowing sweat to evaporate from the skin rather than saturating directly into the jersey and keeping the outer layer from clinging to your back during hard climbs. The mesh also provides a slight wicking assist that draws moisture away from the skin more aggressively than bare skin alone.
The body-mapped knit zones vary mesh density across the torso and shoulders, concentrating maximum airflow at the highest heat-generating areas and providing slightly more coverage at the sides where chafing from jersey seams would otherwise develop. The fit is snug enough to stay flat under a jersey without bunching, and the short sleeve length works under any road or gravel jersey from early spring through late fall. Machine washable in sizes XS through XL, made in Italy, the Pro Mesh M Short Sleeve Black is the base layer that makes your hottest rides noticeably better.
All the specs
- Construction
- Open mesh, body-mapped zones
- Sleeve
- Short sleeve
- Colorway
- Black
- Sizing
- XS, S, M, L, XL
- Care
- Machine washable
- Origin
- Made in Italy
Good questions
Get to know Castelli

There's more to Castelli than this one product. Our Castelli page has the full Castelli lineup we carry and more about the brand.
Visit the Castelli page →Does a mesh base layer actually keep you cooler than nothing?
Yes, in most conditions. The air gap created by the mesh between skin and jersey allows evaporative cooling from sweat. Without a base layer, sweat wets the jersey directly, which clings and reduces cooling efficiency.
How does the Pro Mesh M compare to the Prosecco Tech base layer?
The Pro Mesh M uses an open mesh construction for maximum warm-weather ventilation. The Prosecco Tech base layers use a denser knit for thermal properties in cooler temperatures. Use Pro Mesh for summer, Prosecco Tech for cold-weather layering.
Will the black color make you warmer in summer sun?
The open mesh structure dominates the thermal equation more than colorway in a base layer. Black absorbs slightly more radiant heat than white, but the airflow through the mesh is the primary factor in your thermal comfort.
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