Castelli Thermo Skully
A high stretch winter skull cap with a warm Thermoflex fleece fabric construction. Ideal for use under your helmet during cold weather rides.
Thermoflex gives you a stretchy layer of cold weather protection. Its fleecy inside traps a layer of warm air next to your skin, while its high stretch gives you an aerodynamic fit.
Soft Thermoflex fleece fabricMoisture wickingIdeal for use under your helmet