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Castelli Flandria Warm Base Layer - Long Sleeve - Women's


Item # CST004B

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  • Grey, XS ($79.95)
  • Grey, S ($79.95)
  • Grey, M ($79.95)
  • Grey, L ($79.95)
  • Grey, XL ($79.95)
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Item # CST004B

Keep warm and keep riding.

There are countless weather problems that every cyclist has to prepare for during the fall, winter, and spring. For rain, you'll want a rain jacket that doesn't make you overheat. For chilling wind, you'll need a wind blocking jersey, instead. If choosing the appropriate outerwear is among the most important decisions a cyclist can make in the colder months, then choosing the right base layer isn't far behind. Happily for us, when the temperature drops to 10 degrees Fahrenheit either side of freezing, then this second choice is easy: Castelli's Flandria Warm Base Layer with Long Sleeves.

The Flandria is made with a durable SottoZero Fleece that insulates and wicks. Dryer, after all, is warmer. Mesh inserts provide ventilation in the underarms, just in case you overheat, and the flatlock stitching and flat hems mean the Flandria will fit comfortably as a piece of layering gear. Castelli recommends it for use in 23 to 46 degrees, and, while this range may seem excessively broad, we find that the Flandria gets the job done in all conditions when layered with the right outer layer.

The fit is snug and long, with an exaggerated hem and sleeves to ensure no gap in coverage between top and bottom, gloves and cuffs. It's snug enough that you can wear it however you need it: under a jersey in the low 40s, under a jacket in the low 30s, under rainwear — whatever the situation calls for. The Flandria Warm's branding is less ostentatious than the basic Flandria jersey, comprising only a simple, non-stylized Castelli with no red scorpion logo. Chances are good that, if conditions call for the Flandria Warm, you'll likely keep your jacket or outer jersey zipped up the entire ride. The Flandria Warm isn't for showing off, it's purely for keeping you warm; however, it will let you accumulate base miles through the coldest months so that, come spring, your legs will be doing all the talking.

The Castelli Flandria Warm Base Layer - Long Sleeve - Women's is available in five sizes ranging from X-Small to X-Large in the color Grey.

Tech Specs

SottoZero Fleece
Claimed Weight:
size small 103 g
Recommended Use:
Manufacturer Warranty:
1 year

Size chart

Castelli Sizing Chart

Note: Castelli has a "Euro" slimmer fit. We suggest ordering at least one size larger than your normal US size.

Women's Cycling Apparel
Chest 79cm
Waist 63cm
Hips 87cm
How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Natural Waist:
Measure around your natural waistline, keeping the tape a bit loose.
Measure around the fullest part of your body at the top of your legs.
Using pants that fit well, measure the crotch seam to the bottom of the leg.

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Warm, thin and stylish

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

This base layer is warm, soft, fitted and stylish. It's thin and fits nicely under a jacket. I live in Arizona and the winters get cold. This base layer keeps me warm without being too bulky.

Best Base Layer I Own

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: large

the body and arms of this is sooo soft and even though it isn't thick, it does the job of keeping you warm! The under arm material is great as well, I have yet to sweet in this, it's like they know where to vent and again, the thin material is amazing. I ride 2+ hours in below freezing temps and my body is perfect with this and the Castelli Alpha Jacket.

I like this

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Medium

Nice top - warm and comfortable. The small was too small so I returned for a Medium. I wish the Medium was a tighter fit in the waist area but otherwise it's great.