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Extend the temperature range of your biking shorts with Castelli's Thermoflex Knee Warmers.

If you ever wish your bike shorts could magically grow to cover your knees when it gets cold, or that your pants could shrink up for spring riding, grab the Castelli Thermoflex Knee Warmers. These stretchy fleece warmers cover your knees, so you can pair them with your riding shorts on chilly days. Elastic on the cuffs of the Thermoflex Knee Warmers gives them a solid fit, while Castelli's scorpion logo adds eye-catching detail.

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Castelli Thermoflex Classic Knee Warmer

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Here's what others have to say...

5 5

Sizing question.

I am 6'2" 210 lbs. any suggestions on size? Thanks.

Responded on

I'm 6'0" and the Large fits well. It goes to mid-calf. I guess I have normal sized legs and they are not too tight or loose.

5 5

Oh so cozy

Love these for those crisp morning rides where leg warmers would just be too much, but flying bare would be too uncomfortably chilly. These are made of a quality and cozy material, and come at a surprisingly low price for Castelli. I am 5'10 160lbs and found the medium to fit perfectly.

What size do I need? I am 5'10 150 ibs

Posted on

What size do I need? I am 5'10 150 ibs

Best Answer Responded on

Medium should fit you spot on :)

Responded on

I'm the same size and mediums are just right.

5 5

Excellent and great value

These are really great knee warmers. Good fit and looks, very comfortable. At this price, they're a steal. I highly recommend these.

fall riding

Posted on

Responded on

Fun video, but not specifically useful for evaluating these knee warmers.

my husband had knee surgery and the cold...

Posted on

my husband had knee surgery and the cold really gets to his knees. Will these help or are they just for bile riders

Responded on

They should work for anyone that needs to keep their Knees warm. He may have problems with them falling down because of no Lycra short holding them up.

5 5


These are perfect for cold weather rides. I don't own a pair of full length bibs, but these are warm enough for rides between 40 - 50 degree f.

Responded on

i don't know if this is for anybody or just bike riders