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Castelli Thermo Skully

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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

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