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Castelli Thermoflex 2 Kneewarmer - Black

Castelli Thermoflex 2 Kneewarmer - Black

The Castelli Thermoflex 2 Kneewarmer provides exceptional warmth and flexibility for cycling in dr...

Best current price£24.39from 365Rider ES

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365Rider ESCastelli Thermoflex 2 Knee Brace Black, Size XL
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£24.39
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Leisure Lakes BikesCastelli Thermoflex 2 Kneewarmer Black
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£43.00
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Product Information

Full details

The Castelli Thermoflex 2 Kneewarmer is designed for cyclists who require additional warmth during shoulder-season rides in cool, dry conditions ranging from 12°C to 20°C. These fleece-lined warmers offer excellent thermal regulation and high-stretch mobility for a natural pedal stroke, though they are not intended for wet or rainy environments as the material lacks water-repellent properties.

All features

Age Groupadult
ColourBlack
GenderUnisex
MaterialFleece
Model Part NumberCS195320103
BrandCastelli

Extended Product Information

FAQs

What is the recommended temperature range for these warmers?

They are designed to perform best between 12°C and 20°C.

Are these warmers waterproof?

No, the Thermoflex fabric is designed for dry conditions and does not provide protection against rain.

Should I wear these under or over my bib shorts?

It is recommended to wear the warmers directly against the skin on your thigh, typically under your bib shorts, to prevent slipping.

Can I machine wash these?

While hand washing is best for longevity, you can machine wash on a cold, delicate cycle in a mesh laundry bag.

Do these provide sun protection?

The dense fleece fabric offers a layer of protection from the sun, though they are primarily designed for thermal regulation.

Troubleshooting

Warmers sliding down during a ride

Ensure the silicone gripper is in direct contact with your skin and not placed over the leg grippers of your bib shorts. Wipe the silicone with a damp cloth to remove oils that may reduce grip.

Chafing behind the knee

Check that the warmer is positioned correctly and that the seam is aligned properly; ensure you are not wearing the warmer inside-out.

Pros and Cons

Pros

  • Superior thermal insulation for cool weather
  • Highly flexible fabric allows for full range of motion
  • Secure fit with reliable silicone grippers
  • Minimalist seam construction reduces friction
  • Easy to stow in a jersey pocket when temperatures rise

Cons

  • Not water-resistant or windproof
  • Only suitable for dry, cool conditions
  • Limited protection from road spray

Setup, Compatibility & Care

To ensure proper function, slide the warmers up so the silicone-gripped elastic sits directly against your skin on the lower thigh, rather than over your bib shorts, to maximize hold. For long-term care, hand wash the warmers in cold water with mild detergent to preserve the elasticity of the silicone grippers. Avoid using fabric softeners, as these can clog the fleece fibers and reduce moisture-wicking efficiency. Always air dry away from direct heat sources to prevent the fabric from losing its shape or elasticity.

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