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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
Warm and wicks well
by Anonymous
Southern California
1 of 1 customers found this review helpful.

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

Reviewed 1/26/2017
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Good but neck is too tight
by woodcraft
Cycling Enthusiast

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.

Reviewed 1/2/2017
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Most comfortable base layer I have.
by SonomaCyclist
Cycling Enthusiast
Sonoma County

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.

Reviewed 6/4/2018
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Needs a longer cut
by Rob
0 of 1 customers found this review helpful.

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

Reviewed 2/23/2018
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