Castelli Nano Flex 2 Bib Tights


Size Guide

Castelli Men's Clothing Size Guide
  S M L XL 2XL 3XL
Chest (cm) 92 96 100 105 110 115
Waist (cm) 80 84 88 93 98 103
Hips (cm) 94 98 102 107 112 117
Inseam (cm) 82 83 84 85 86 87


Castelli Shoe Cover Size Guide
  S M L XL 2XL
Men's/Women's EU Size 39-40 41-42 43-44 45-46 47-48


Castelli Men's Socks Size Guide
  S/M L/XL 2XL
Men's Shoe Size (EU) 35-39 40-43 44/47


Castelli Gloves Size Guide
Men/Women <17cm 17-20cm 20-23cm 23-25cm 25-27cm >27cm


Sold out

Live Chat

Average connection time 25 secs

Average connection time 25 secs

Rain or shine

In dry conditions our Nano Flex fabric is stretchy, breathable and warm thanks to its softly fleeced inner face. But in wet conditions the nanotechnology water-repellent surface keeps much of the moisture at bay. There is no membrane to block breathability, though, so in harder rain or on longer rides some moisture will come through. But that’s when this fabric is at its best: it never feels waterlogged, it almost feels dry on your legs, and best of all it continues to keep you warm. If you’re going to do serious rain riding, you should look to our Nano Flex Pro Bibtight, or even the Tempesta Pant, but for lighter rain, warmer temps or wet roads this will be ideal.


  • Nano Flex fabric provides outstanding warmth and stretch with water resistance
  • Minimal seams for maximum water resistance
  • KISS Air seat pad for all-day comfort
  • Mesh bib straps for breathability
  • Reflective screen-printed Castelli graphic on both legs
  • GIRO³ ankle grippers lie flat and seal around shoecover
  • YKK® ankle Camlock® zippers with reflective tape for high visibility


  • Windproofness
  • Waterproofness
  • Insulation
  • Breathability
  • Lightweight
Nano Flex Fabric
All-Weather Protection
Size / Fit:

Aerodynamic Fit

How long will it take to arrive?

Please check the stock availability notice on your item when placing your order. This item is: Sold out.

How will I know it has been sent?

You will receive an email to confirm when your item has been sent.

You can also check the status of your order and individual items by accessing My Account details and following the prompts.

Please allow 10 working days from dispatch of your order before notifying us of any late deliveries.

It may be advisable to check with your neighbours to see if a parcel has been left with them, check any outhouses you might have where it may be left if it cannot fit through your letterbox and contact your local sorting office to see if the item has been returned to the depot as undelivered and awaiting collection.

If I'm not completely happy with my item?

Please see our returns policy.

Customer Reviews

Overall Rating : 4.29 / 5 (7 Reviews)
  • 2 5 star reviews
  • 5 4 star reviews
  • 0 3 star reviews
  • 0 2 star reviews
  • 0 1 star reviews

Top Customer Reviews

Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.


Comfortable ,warm and good styling.Could probably have used next size up but overall happy with my purchase.Wouldnt hesitate to buy other items from Pro Bike Kit.

They're good

Purchased my second pair for this coming winter. Im 185cm and about 72kg - i find i am generally an XL for all things Castelli, i have both L and XL in this product, and find the XL is better fitting. the tights are very effective in keeping warm - together with a standard base layer top and the Castelli Gabba jersey i feel bulletproof in just about any winter weather (its often around 5-10 degrees celsius when i head off in the morning). Breathes well, so have not had an overheat / sweat problem. From a waterproofing perspective, I would categorise them as water resistant, not proof. Droplets bead off the material exactly as advertised, any heavy amount of rain starts to penetrate, but for legs thats fine. Absolutely recommend as essential bit of winter riding kit.

Pretty effective

While these aren't waterproof water beads up on them and rolls off. The pad is a bit on the thick side--not as good as the Progetto X2 in the Sorpasso tights despite the price being approximately the same. These are good for riding in cool and wet conditions and complement Gabba/Perfetto tops.

Castelli Nanoflex 2 bib tights

I bought these as a replacement to the original version of these tights and I am equally as impressed. At 5'10" & 65kg the large is a good fit. I particularly like the light unrestricive feel of these tights and the pad remains comfortable on rides of 80+ miles. Unfortunately, rain dosnt seem to bead on them aswell since their first wash? (Washed at 30oC, used non bio etc etc) but they do still keep light rain at bay quite well. Would recommend but be careful on the sizing.

Castelli Bib Tights

Have never afforded cool weather wear before, so these bib tights are quite a treat. I love them. Comfy and warm.


It's my best choice. Excellent item

Excellent Bibs

The Castelli Nanoflex is excellent material. It dispels the water easily, although a little does seem to get in through the seams, but not a lot. Also very warm and fits well/tightly. I guess this will stretch slightly with wear so suggest people persevere if they initially think the item is too small. Nice design and comfy for winter :-)