Base Layers

Made with Castelli's warmest base-layer fabric and an extra-long neck that can be pulled up to cover your mouth and face.

Warm, dry, comfortable. This is the base layer you want if you're riding outside in cold temperatures.

Warm, dry, comfortable. This is the base layer you want if you're riding outside in cold temperatures.

Made to keep you dry in cool conditions, this base layer features body mapping construction with Prosecco hydrophilic treatment on the main body fabric and lighter-weight PrimaLoft® fabric aligned to the parts of the body covered by the bibtight straps.

Warm base layer made of Merino wool on the outside and super lightweight and elastic Dryarn on the inside.

Castelli Core Seamless Base Layer SS – Soft, lightweight, and warm seamless base layer for running and cycling. Perfect for cool conditions with excellent moisture management.

Female friendly thermal base layer with excellent wicking and a distinctively feminine look, the high neck keeps drafts at bay while the long arms and body keep you snug on the bike and the seamless construction offers subline fit and comfort.

The Castelli Women's Flandria Warm Long Sleeve Baselayer is all about comfort and warmth. Comfort from the female specific cycling cut. Comfort from the flat lock stitching that sits flush to the skin, comfort from the flat hem and the mesh inserts shaped for hips and bust comfort from the high wick fabric and comfort from the ultra soft brushed fleecy surface. Add some luxury to your winter riding and slip a Flandria Warm LS on under your favourite Castelli jersey or jacket.

It's a cycling bra, not a sports bra. Developed with advice from women's pro team, it's the first bra specifically designed for cycling with maximum support and moisture management. Rather than compressing like most sport bras, this bra gives enough support then concentrate on breathability and comfort.

It's a cycling bra, not a sports bra. Developed with advice from women's pro team, it's the first bra specifically designed for cycling with maximum support and moisture management. Rather than compressing like most sport bras, this bra gives enough support then concentrate on breathability and comfort.

WorldTour winning base layer with a graphic print that shows your style on the inside.

Castelli's lightest and airiest base layer wicks moisture away from your skin, while the open mesh helps hold the jersey up and away from the skin. It's good for warm conditions, and some riders even like it on a hot day, as it allows airflow between the jersey and skin.

Castelli's lightest and airiest base layer wicks moisture away from your skin, while the open mesh helps hold the jersey up and away from the skin. It's good for warm conditions, and some riders even like it on a hot day, as it allows airflow between the jersey and skin.

Castelli's lightest and airiest base layer wicks moisture away from your skin, while the open mesh helps hold the jersey up and away from the skin. It's good for warm conditions, and some riders even like it on a hot day, as it allows airflow between the jersey and skin.