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Castelli Nano Flex 3G Legwarmer Savlie Blue
Savlie Blue
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Castelli Nano Flex 3G Legwarmer


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Mfg PartNum:
$79.99 pr.
MSRP: $79.99
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Nano Flex 3G Leg Warmer

For the flexibility to add and remove an extra layer on those chilly spring and fall rides, adding a good pair of leg warmers is essential. Unlike wearing full-length tights, you have the option to slip off your leg warmers mid-ride and stow them in your pocket when your temperature needs adjusting.

As light rain comes down and you need protection from road spray, the Nano Flex 3G Leg Warmers have you covered without allowing moisture to soak through. When the skies are clear but the conditions are brisk, these leg warmers are highly breathable and lightweight enough for riding temps ranging from 54 - 68° F.


  • Rain or shine, these leg warmers are highly versatile and breathable
  • Water repellant NanoFlex technology keeps you dry and warm
  • More breathability to prevent overheating
  • Single, flat-lock seam ensures maximum comfort
  • Gripper is made of double-sided silicone keeping the warmers in place
  • Easy on/off and stowable in a jersey pocket
  • Castelli recommends these warmers for temperatures ranging from 54 - 68° F

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Size Chart



Black - Small

Mfg PartNum: O19577010-2 

Black - Medium

Mfg PartNum: O19577010-3 

Black - Large

Mfg PartNum: O19577010-4 

Black - X-Large

Mfg PartNum: O19577010-5 

Savlie Blue - Small

Mfg PartNum: O19577414-2 

Savlie Blue - Medium

Mfg PartNum: O19577414-3 

Savlie Blue - Large

Mfg PartNum: O19577414-4 

Savlie Blue - X-Large

Mfg PartNum: O19577414-5 


Ordered by Most Relevant First
5 stars
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3 stars
2 stars
1 stars
Reviewed 1/10/2020
by Anonymous
Overall Rating
2 of 2 customers found this review helpful.

Castelli tends to run small, I sized up and fit was good, zipper at ankle was nice and seemed durable. Keep me warm in 50 degrees farenheit range.

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Reviewed 3/28/2022
by Anklebiter
Competitive Racer
Eugene, Oregon
Overall Rating
Great fitting leg warmers with seems on that run on the sides of your knees.

Riding in temps below 50 degrees. They shed light rain and try quickly. They have changed the design with the same fleece used throughout the leg warmer. In the past they had a lighter material that allowed for more freedom of movement.

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Reviewed 2/6/2023
by Roland
Overall Rating
Wonderful knee warmer to have

Wonderful knee warmer

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Reviewed 11/20/2022
by Anonymous
Overall Rating

Used to love these, and had two previous versions. The 3g ones are much shorter with large ankle openings. No go for me.

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Mechanic's Corner

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All about leg and arm coverings to keep you protected in inclement weather.
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