Castelli NanoFlex Knee Warmer

Castelli Clothing

2 Rider Reviews
Earn 35 Rider Points when you buy this item
Delivery & Returns

When the conditions are changeable, cycling knee warmers are your best friend on the road, offering much needed weather resistance and warmth right when it's needed, and the Castelli NanoFlex Knee Warmer is a great example in this genre.

Offering a wind resistant outer is pretty standard, but for the NanoFlex Knee Warmer, things get really interesting when it starts raining and its water repellent properties come into play. Whilst not full-on rain proof, they will repel showers, which on fast descents or long stretches far from home, can be a really handy feature. Smooth, stretchy and highly breathable, they are great in every ride condition. A silicon top gripper completes the warmer.

Castelli NanoFlex Knee Warmer

Earn 35 Rider Points when you buy this item
Please Select
Size Chart

Product Review Summary

Overall Rating

5.0 out of 5

2 Rider Reviews

Size Feedback

Sizes small

True to size

Sizes large

Purchase History

  • 56 riders
    bought this item

  • 4 riders
    want this item

Product features
  • Water Resistant
  • Wind Resistant
  • Open Road
In Detail
  • Water-resistant NanoFlex fabric
  • Warm, stretchy and breathable
  • Great in every possible ride condition
  • Silicon top gripper for a non-slip fit
  • 79g (pair)
  • Nanoflex materials make the perfect inclement weather warmer
  • Designed to be paired up with the Gabba or Nanoflex ranges
  • Packs down super small for mid-ride changes
  • Wash cold
  • Air dry
what are riders saying about this product (2)
Rider reviews (2)
1 rider recently bought or want this item
Write a review
  • allen trewern United Kingdom 27•04•2016
    allen trewern United Kingdom 27•04•2016
    Great fitting, good wind resistance and look really good matching with my Gabba and other Castelli gear. Very good and quick service from Always Riding.
    0 out of 0 riders found this review helpful.
  • Giles Councell United Kingdom 10•06•2015
    Giles Councell United Kingdom 10•06•2015
    Keeps the knees toasty for those early mornings
    0 out of 0 riders found this review helpful.

Always Riding

Size help and product measurements
Castelli NanoFlex Knee Warmer

Size Feedback

Sizes small

True to size

Sizes large

Size Chart
This is the brand’s general size chart, use this to get an idea of which size is right for you.
chest (inches) 36 38 39.5 41.5 43.5
waist (inches) 31.5 33 34.5 36.5 38.5
inseam (inches) 32 32.5 32.5 33 33.5
chest (inches) 31 33 35 37 39 41
waist (inches) 25 26.5 28.5 30.5 32.5 34.5
hips (inches) 34.5 36 38 40 42 44
palm size (cm) 24 24.8 25.4 26.6 26.4
For an accurate glove size, please measure across your flat open palm just below the fingers, then compare your measurement to the chart above. If it's a close call, go one size up or down depending on the result.
shoe size (Euro) 36-39 40-43 44-47
shoe size (Euro) 36-39 40-42 43-44 45-46 46-48

Where is my order sent from?

All orders are packed & shipped from our HQ in the UK on the same day you order, if in stock and ordered before 3pm GMT Monday to Friday.


We offer both mail and express ship options courtesy of Royal Mail and DHL respectively. Below you will find a rundown of default delivery costs, but to see your personalised shipping cost, please visit the delivery section of checkout when you have added some items to your bag. Please note that orders of bulky items will attract a surcharge.

 Royal Mail*Express*
UK Free, or £3 for Tracked 48 DPD Next Day (Mon-Fri), £5.00
N. AMERICA Up to 10 working days, from $8 2 day, from $10
EUROPE Up to 5 working days, from €5 Next day, from €8
SCANDINAVIA Up to 5 working days, from €5 Next day, from €10
AUSTRALIA / NZ Up to 10 working days, from $10 3 day, from $20
JAPAN Up to 10 working days, from ¥700 3 day, from ¥1400
REST OF WORLD Up to 14 working days, from $10 3 day, from £20

60 Day Returns

Returns are really simple. We include a returns address label inside every package, so if you would like to return something to us, just make sure to send it back up to 60 days after you have received it.

Write Your Own Review
Thanks for taking the time to write a review! Your thoughts and experience are highly valued by other riders who might be looking to buy this product, so rating and writing a few words about it, whether they are your overall impressions, tips, or if you would recommend the product, would be really appreciated. Just follow the three simple steps below, then click submit.
New review of Castelli NanoFlex Knee Warmer
Only registered users can write reviews. Please, log in or register
Message me when back in stock
Enter your email address and choose the attribute you are looking for, and we will email you as soon as it arrives back in stock!
ride to the top