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The Castelli under-helmet cap for women is a thin, close-fitting head covering for wearing under your helmet.

Castelli under-helmet caps for women

Under the helmet, it absorbs sweat, protects against chafing from the pads and keeps you slightly warm. The fabric wicks moisture to the outside and dries quickly.

If you have long hair, there is another practical benefit: the cap keeps your hair together under the helmet, which avoids pulling on the helmet straps.

Tip: For sub-zero temperatures, choose a windproof material. Normal knitted hats let the wind through.