Castelli Flanders Warm Long Sleeve


Castelli's warmest baselayer offering both insulation and breathability. The Flanders Warm base layer was made for the conditions seen in Flanders in February. Or basically any month between September and May.

It features a high-loft fleece on the inside that provides warmth to spare, and you'll love the softness on your skin. Combine this warm and luxurious SottoZero fabric with the excellent moisture management supplemented by mesh underarm inserts and you have the perfect winter layer for under your Castelli winter jacket.

The Flanders fabric is stretchy for a perfect fit and combined with the flat-lock seams fits beautifully under the bibs of our winter tights with no bunching or rubbing.

Key Features

  • SottoZero Fleece Multi-denier 100% polyester fabric
  • Flat-lock stitching
  • Mesh armpit inserts
  • Flat hem tucks away into tights
  • Mock turtleneck
  • Sizes men's XS-3XL
  • Weight 116g
  • Castelli Comfort range -4 to 10C


  • Team Sky
  • Road
  • 0°C to 5°C
  • 6°C to 10°C
  • -10°C to 0°C
  • 16°C to 20°C
  • AW22
  • Castelli
Cycling Clothing Fit:
  • Race Fit
  • Regular Fit
Size / Fit:
  • Form fit

  • Grey
  • 100% Polyester

How long will it take to arrive?

Please check the stock availability notice on your item when placing your order. This item is:

How will I know it has been sent?

You will receive an email to confirm when your item has been sent.

You can also check the status of your order and individual items by accessing My Account details and following the prompts.

Please allow 10 working days from dispatch of your order before notifying us of any late deliveries.

It may be advisable to check with your neighbours to see if a parcel has been left with them, check any outhouses you might have where it may be left if it cannot fit through your letterbox and contact your local sorting office to see if the item has been returned to the depot as undelivered and awaiting collection.

If I'm not completely happy with my item?

Please see our returns policy.

Customer Reviews

Overall Rating : 4.33 / 5 (3 Reviews)
  • 2 5 star reviews
  • 0 4 star reviews
  • 1 3 star reviews
  • 0 2 star reviews
  • 0 1 star reviews

Top Customer Reviews

Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.

Favorite piece of gear

This baselayer would have been perfect in Ontario during the cold months and great now for my morning ride out here on Van Island. This featherweight piece is snug and a bit tight over the head when you first slip it on but trust me the fit is awesome if you're looking for a streamlined piece to wear under your winter jersey/jacket or water/windproof jacket.

Castelli Flanders base layer

Nice product but fits very small . Ordered a large can hardly fit it over my head.

Perfect for those cold, cold days.

When it's cold, I mean around the 5 to 0 mark this is the perfect item. I usually take an xl in castelli tops, and went with the same....however the L would have been just perfect. The XL is still a good size for me, 80kg and 6ft 1inch, after one wash it did shrink a little so it fits well. Xl had no issues with the neck as others have noted. Overall a great base layer for the cold days. I wear it under a Gabba and have worn it down to -2 without getting cold.