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CastelliThermoflex 2 Knee Warmer

Sale 20% OffCurrent price:$31.99 Original price:$39.99

Item # CST00UL

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  • Black, S ($31.99)
  • Black, M ($31.99)
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Item # CST00UL

Thermoflex 2 Knee Warmer

Throw on your favorite bib shorts and grab a set of the Castelli Thermoflex 2 Knee Warmers and enjoy a bit of extra protection from the cold when you're cycling in the shoulder seasons. The Thermoflex fleece fabric is warm, stretchy, and soft, and is constructed using flat-lock seams in order to alleviate any irritation or discomfort.

  • Protect your knees on chilly rides with these soft warmers
  • Thermoflex fleece provides warmth and next-to-skin comfort
  • One-piece design with flat-lock seams prevents irritation
  • Elastic cuff with gripper keeps them from sliding down

Tech Specs
MaterialThermoflex fleece
Recommended Useroad cycling
Manufacturer Warranty1 year


Arm & Knee Warmers





Rider Weight

99.2 - 132.3lb

(45 - 60kg)

99.2 - 132.3lb

(45 - 60kg)

132.3 - 154.3lb

(60 - 70kg)

154.3 - 176.4lb

(70 - 80kg)



Short/Jersey Size XS - S S - M S - M L - XL 2XL - 3XL
Short/Jersey Size:
Take your typical cycling short or bib sizing for comparison.

What do you think about this product?


>Rating: 1

Disappointed in New Castelli Kneewarmers

I returned this product before using it
True to size

I have 2 pairs of Castelli Thermoflex Kneewarmers bought in early 2019 that I love and wear all the time! I wanted to order more, but only saw Thermoflex 2. Ordered 2 pairs. They are totally different and I cannot keep the bottoms from creeping up my calf to my knee. The previous versions were much longer with better grippers at both ends and totally stayed in place. Very diappointed; unusable! Will return the unused pair but unfortunately I wore one pair on a ride to test them out and 30 days has elapsed so I guess I am out of luck, seriously!