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Castelli Nanoflex Leg Warmer

Castelli Clothing

4 Rider Reviews
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When the conditions are cold & changeable, cycling leg warmers are your best friend on the road, offering much needed weather resistance and warmth right where it's needed, and the Castelli Nanoflex Leg Warmer is a great example in this genre.

Offering a wind resistant outer is pretty standard, but for the Nanoflex Leg 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 Leg Warmer

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Size Chart

Product Review Summary

Overall Rating

4.8 out of 5

4 Rider Reviews

Size Feedback

Sizes small

True to size

Sizes large

Purchase History

  • 103 riders
    bought this item

  • 1 rider
    wants 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
  • Double-sided silicone grippers keep the warmers in place
  • Ankle zips
  • 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 (4)
Rider reviews (4)
1 rider recently bought or want this item
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  • michael oneill United Kingdom 19•05•2016
    michael oneill United Kingdom 19•05•2016
    Ideal in winter and spring, keeps the rain at bay for long periods.
    0 out of 0 riders found this review helpful.
  • Chris Mann United Kingdom 05•05•2016
    Chris Mann United Kingdom 05•05•2016
    Couldn't find any lighter weight bib tights for those days where the temps don't justify a heavyweight Roubaix tight ie, 5-10 degree, so thought I would try these with shorts as it's generally just my legs that feel the cold on such days. Found that these work well for the purpose. Probably a little bulky to put in a jersey pocket should the need arise but weren't purchased with the view that they would be taken off mid ride - so not a problem to me. Found the zipped leg is a better idea than the elasticated ankle cuff.

    Good quality and for once a Castelli product that is larger than expected!

    Got caught in a rain shower and the water just beaded on them without going through - so yes they do exactly as intended. Would recommend for those really uncertain days.

    Now for the sizing info which is usually a bit vague where arm & leg warmers are concerned.

    Usually a large in all other brands. XL in Castelli but tried the large as I had read that they do indeed come up closer to regular sizing but found the thigh gripper just a bit to loose, so changed for a medium.

    The medium is a good fit for me at 1.80m tall with an 82cm inseam and 55cm thigh circumference. Could probably add a couple of centimetres to that circumference and find they are still comfortable around the leg.

    Length wise the Medium were fine.The Large are about 3cm longer than the Medium.

    I'm 1,80m with an inside leg at 82cm
    0 out of 0 riders found this review helpful.
  • samson hung Hong Kong SAR China 20•12•2014
    samson hung Hong Kong SAR China 20•12•2014
    The size is correct , and it didn't move under , bike pants or tight , lucky I worn it or I will freeze to death , material is comfortable and stronger than I expected , no allergy to it which is good , thx castelli nice one
    0 out of 0 riders found this review helpful.
  • Chris.L United Kingdom 15•12•2014
    Age: 18-25 Gender: Male Rides: Commute
    Chris.L United Kingdom 15•12•2014 Age: 18-25
    Gender: Male Rides: Commute
    Sweet leg warmers! Have had no issues so far with these over a couple of months of commuting. The water resistance is ideal for the wet roads and light drizzle. They don't let you overheat either. Really comfortable, great product.
    0 out of 0 riders found this review helpful.
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Size help and product measurements
Castelli Nanoflex Leg 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 over £30, 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.

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