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Nano Flex 3G Kneewarmer

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Nano Flex 3G KneeWarmer

For the flexibility to add and remove an extra layer on those chilly spring and fall rides, the Nano Flex 3G KneeWarmers are supremely versatile. Unlike wearing full-length tights or leg warmers, you're covered where it matters most. Your joints.

Proprietary to Castelli, the Nano Flex technology is a water-protective finish paired with their tried and true Thermoflex fabric, offering you the best coverage in all-conditions.


  • All condition kneewarmers
  • Water repellant Nano Flex technology keeps you dry and warm
  • 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

Ordered by Most Relevant First
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good fit and finish
by Anonymous
Daily Commuter
washington state

replaced my pearl Izumi knee warmers with these and have been very pleased with how well they perform

Reviewed 4/25/2020
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