Pro Thermal 3 Skully - Men's

What Our Gearhead® Experts Are Saying:

"I use this on every early-season ride where the start temp is well below where my kit normally operates comfortably. The flat lock stitching keeps it from ever feeling like a seam under my helmet, even hours into a long day."

Castelli built this skully from Thermoflex fabric, warm, soft, and stretchy enough to sit flush under a helmet without adding pressure points or bulk. Flat lock stitching removes friction points across long rides, and reflective detailing on the back adds a margin of visibility for pre-dawn starts.

This is the piece we reach for on any ride that starts colder than it finishes, thin enough to forget about once the temperature climbs and effective enough to matter when it doesn't.