Castelli Nanoflex Leg Warmers

MSP  £ 50.00    SAVE 20%
YOUR PRICE: £ 40.00
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In stock at our suppliers warehouse, estimated dispatch in 6 - 7 days

We will dispatch this item on a priority dispatch service for no extra charge when we have received it from our supplier. This provisional delivery date has been provided by our supplier and can be subject to change.

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An absolute must for any cyclist, Castelli Nanoflex Leg Warmers are without parallel.

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The Nanoflex material is water resistant, allowing water to run off them and thus keeping you warmer in bad weather. Additionally, they act as an effective barrier to wind and other elements, without compromising breathability to keep you warm but fresh.

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Castelli Nanoflex Leg Warmers

A staple part of any cyclist’s wardrobe is the humble leg warmer. One of the most versatile pieces of kit a rider will own. This is even more so with the Castelli Nanoflex Leg Warmers, the choice of Team Cannondale professional cyclists when the weather turns bad. They have used them in abysmal conditions where keeping the legs warm, dry and functioning at there best was of paramount importance.

Unlike standard leg warmers that absorb water, weighing you down, getting you cold and making you uncomfortable, the Nanoflex material is water resistant and keeps the worst of the weather at bay.

This leg warmer has another party trick in the dry, when it transforms into a Thermo-Flex product, keeping the rider warm and keeping the wind chill out with a very stretchy fabric.

The Nano name comes from the use of nanofilaments, that repel water and allows rain to run off the fabric rather than absorbing it.

Do not panic though, this is not a boil in the bag, sweaty garment. The Nanoflex material is still highly breathable, an ideal fabric whatever the temperature or whatever falls out of the sky.

Ankle zips make taking the leg warmers on and off a breeze and silicone grippers round the legs keep the warmers from slipping down.


Castelli recommend you try the same size warmer as you wear in shorts since the openings will be sized similarly.

  • Water resistant Nanoflex fabric
  • Same breathability, stretch, and warmth as Castelli's standard Thermoflex warmers
  • Double-sided Silicone grippers keep the warmers in place
  • Ankle zips
  • Weight: 134g
  • Temperature range: 10-16°C, 50-60.8°F
  • Available in a range of sizes
Size Guide

UK Delivery Options


Free Delivery on all orders over £30

Estimated delivery within 4 working days (a delivery charge of £1.99 for orders under £30.00 will apply)

CollectPlus Delivery

Have your order delivered to your local shop for just £1.99! For Highlands and Islands, please allow up to 5 working days. Orders can be shipped to UK CollectPlus locations specified on the website where they will be held awaiting collection for a period of 10 days.

Orders placed are normally dispatched within 2 working days.

Priority 1st Class Delivery - £2.99

Estimated delivery within 2 working days.

Next Working Day Delivery* - £4.99

A guaranteed tracked courier delivery, place your order before 3pm, deliveries are made Monday to Friday.

Saturday pre 12 Delivery - £4.99

Saturday delivery orders must be placed by 1pm Friday and is only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Saturday pre 12pm by courier. Package must be signed for upon delivery.

Sunday pre 12 Delivery - £4.99

Sunday delivery orders must be placed by 1pm Friday and is only available on items in stock in our warehouse. Orders are prioritised through our warehouse and are delivered on Sunday pre 12pm by courier. Package must be signed for upon delivery.

Reserve and Collect** - FREE

Reserve & Collect is available on all items marked 'Collection'. It is a FREE delivery option that allows you to collect your order from either our Sigma Sport Store Hampton Wick or our Reserve & Collect location in Esher. Just select the Reserve & Collect button in the basket.

** Reserve and Collect Collections - Clothing, parts and accessories: Next day. Orders placed on Friday, Saturday or Sunday will be available for collection after midday on the Monday (excluding Bank Holidays). Bikes: 4 days if in stock at store, collect in up to 7 days (sometimes quicker) if in stock at warehouse.

* Next Working Day delivery is only available on items in stock in our warehouse and excludes pre- order items. Next Day refers to the next working day, Bank Holidays will add an extra working day to the estimated delivery lead times. UK next day excludes Saturday deliveries. This service is not available to some remote postcode areas. Please contact us for help.

London Same Day (Order Before 1pm)


We offer a Same Day delivery service into London. The cost is £25.00 under 2Kg and £35 over 2Kg. Place your order before 1pm, deliveries are made Monday to Friday. Please note this option excludes bicycles.

More information on our Same Day delivery options.

Bike Deliveries


All our bikes are fully checked and tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for despatch. All you have to do is add the pedals, rotate and tighten the handlebars. Typically we can deliver your bike in 4 - 5 working days.

Deliveries are made Monday to Friday on a pre-12pm delivery. One of our customer service team will be in contact to arrange a convenient day for delivery.

More information on all our UK delivery options.

International Delivery


Sigma Sport delivers to over 100 countries. To see what delivery options are available for your destination, simply select your country on the checkout page. Goods are shipped from the UK. Does not include local taxes or import duties, if applicable.

More information on our International delivery options.

Free Returns


We offer a free returns service for our UK customers. Sigma Sport will happily refund or exchange any item purchased at Sigma Sport, excluding Sigma Sport gift vouchers and personalised products except when faulty.

More information on the Sigma Sport returns procedure.

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