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Castelli Men's Flanders Warm Long Sleeve Baselayer

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The Castelli Men's Flanders Warm Long Sleeve Baselayer features a SottoZero fleece interior that insulates against low winter and spring temperatures while also wicking moisture and having an incredibly soft feel against the skin. Mesh inserts at the underarms improve airflow, and the stretchy fit with flatlock seams means it layers perfectly underneath a jersey or jacket without hindering mobility or causing irritation. Flat hem construction lets it tuck securely into cycling bottoms without creeping up during the course of riding.

Note: Castelli tops and bottoms are designed with a performance cut that often runs smaller than that of other manufacturers. Consider sizing-up one size to ensure a comfortable fit — e.g., if you normally wear a Medium, select a Large in Castelli. Feel free to contact us with any questions or concerns.


Sleeve Type: Long Sleeve 

Grey- Small

Mfg PartNum: A14531008-2 


Mfg PartNum: A14531008-3 


Mfg PartNum: A14531008-4 


Mfg PartNum: A14531008-5 


Mfg PartNum: A14531008-6 

Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
Reviewed 1/26/2017
by Anonymous
Southern California
Overall Rating
1 of 1 customers found this review helpful.
Warm and wicks well

Keep your upper body comfortable and moisture free with this one. Supper comfortable and a great addition for the under 45 degree rides.

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Reviewed 1/2/2017
by woodcraft
Cycling Enthusiast
Value Rating
Overall Rating
Good but neck is too tight

This is comfortable for winter rides, once it is in place.

So far the shirt has not ripped, nor my ears been torn off,

but those seem possible every time it is put on or removed.

Size large shirt, 7 hat size. Maybe Italians have very small heads.

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Reviewed 6/4/2018
by SonomaCyclist
Cycling Enthusiast
Sonoma County
Value Rating
Overall Rating
Most comfortable base layer I have.

Incredibly comfortable under a cycling jacket, it serves its warming purpose without eventually producing the dampness that can lead to a chill at the end of rides. The ventilated underarms and sides work really well while being soft and comfortable.

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Reviewed 2/23/2018
by Rob
Overall Rating
0 of 1 customers found this review helpful.
Needs a longer cut

Material was comfortable enough, but like the Craft Base later much better because it much further below the waist

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