Castelli Difesa Thermal Cap
WARMTH THAT FITS UNDER A HELMET
Castelli original Difesa cap is a Windstopper® piece that's best for extreme conditions.
With the Difesa Thermal Castelli took away the windproofing, but by doing so dramatically improve the moisture management, so it's best for cool to cold conditions, especially with high-intensity riding.
Castelli placed a rib-knit wool wrap around the ears to keep you warm but keep it all relatively thin to fit under a helmet.