With the Castelli Pro Issue underwear you'll be able to handle the intermediate conditions where the Flanders is too warm and the Core Mesh is too light. It won't actually provide warmth, but will serve as a layer that helps wick sweat away from your skin, making your race jersey more efficient.Our 3D mesh fabric creates trapped air zones against your skin, while the capillary diffusion of the polyester helps wick moisture away.
- 100% polyester 3D mesh fabric
- Reduced shoulder seams for added comfort
- Wider collar ideal under an aero shirt
- Flat hem at the waist to easily fit into your shorts
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