Instead of freezing under a well-vented helmet in winter, why not keep warmer with a skullcap by Castelli? The thin Thermoflex material keeps you comfortable when the mercury goes south, while raw-cut edges are much more comfortable, especially around the helmet straps.
- Thermoflex is warm, soft, and stretchy
- Raw-cut edge lies flat and doesn’t bunch under helmet
- Opening at back for ponytail
-Matching colorways for Castelli winter products