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Flanders 2 Warm Long-Sleeve Base Layer - Women's

4.333333333333333 out of 5 stars
3 Reviews
Current price: $82.49 Original price: $109.99
25% off


Size Chart


Why We Like The Flanders 2 Warm Long-Sleeve Base Layer

When there's a bite in the air, we kit up with the Flanders 2 Warm Long-Sleeve Base Layer. This top's silky warmth stops the chill from reaching our bones, while its mesh underarms and wicking prowess make sure we don't overheat.


  • Lightweight fleece provides high-loft warmth on cold-weather rides
  • Flatlock seams minimize friction
  • Tall collar keeps cold winds off your neck
  • Flat hem slips discreetly into your tights
  • Slim fit for layering ease
  • Item #CST00T4
[face fabric] SottoZero fleece (100% polyester), [underarm] mesh
Insulation Weight
Claimed Weight
road cycling
Manufacturer Warranty
1 year

Overall Rating

4.5 based on 3 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 2 reviews
5 Stars - 1 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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4 out of 5 stars

November 19, 2021

X-small crazy small neck

I returned this product before using it

I wear xsmall in all Castelli Wear. This fits me everywhere - except the head opening was wayyyyy too small. I ordered it twice thinking it had to be defective. But no - weirdly tiny. Had to order size up. And it la big on me. But is thin and warm.


Originally reviewed on

4 out of 5 stars

December 20, 2020

Warm, breathable; sizing not accurate

I've used it several times

Very nice base layer, which has been keeping me warm when I wear it under my hard shell winter jacket in -5 to 5 degree Celsius weather. It's thin with a soft fleecy inside. I would recommend ignoring the recommendation to size up from your normal US size, though. I initially ordered a size medium, since I'm usually a small or medium, and on the size chart I was between those sizes. It was really big. I ordered a small, thinking it would be crazy to go down to an extra small when the recommendation and size chart suggested a medium. The small fits pretty well on my arms and across my chest, but is definitely baggy around my waist. Not sure if the extra small would be better or worse, since I didn't want to go through returning another one, but from my experience I would say this base layer runs big.


Originally reviewed on

5 out of 5 stars

November 27, 2020

Soft, thick, warm

I've used it once or twice and have initial impressions

This undershirt was soft and cozy and the material felt comfortable like cotton. Love it.

Monique D

Originally reviewed on