Signin to Your Account
Questions? Call our tri Specialists! 1-800-445-4790
COVID-19 Response
Click to zoom

Nano Flex 3G Armwarmer

Mfg PartNum:
In Stock Now
Ships Free!
Earn $5.99 in Podium Club credit. Click to Learn More.
This size is not eligible for Podium points
Please Confirm Size
Qualifies for Free Shipping!

Ride through the seasons, or changing conditions from morning to night, with Castelli's versatile Nano Flex 3G armwarmers.

Great when it's dry and chilly but also affording extra protection and warmth against wind gusts and fall drizzles, Nano Flex warmers are easy to put on, and just as easy to take off and pack away when the weather improves.

A decade in development, Nano Flex gave birth to the category of water-protective thermal fabrics, and Castelli's proprietary and game-changing invention is often imitated but never equaled.

In non-precipitating conditions, the proprietary third-generation material is stretchy, breathable and soft thanks to its fleeced inner face. Pedal into the elements, though, and the durable surface, which is enhanced with a chemical water-repellent finish, keeps moisture grounded in the no-fly zone.

For those times when you won't accept compromises under any conditions, choose Nano Flex 3G warmers.

Features & Specs:

  • Water-repellent thermal and breathable Nano Flex fabric
  • Flat-lock stitching with single seam
  • Double-sided silicone grippers to keep warmers in place
  • Claimed weight: 66 g

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.


Black - Small

Mfg PartNum: P19529010-2 

Black - Medium

Mfg PartNum: P19529010-3 

Black - Large

Mfg PartNum: P19529010-4 

Black - X-Large

Mfg PartNum: P19529010-5