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Tutto Nano Bib Knicker - Men's

3.3333333333333335 out of 5 stars
3 Reviews


Size Chart


Tutto Nano Bib Knicker

The day started balmy and bright, but there's inclement weather ahead. This may pose as a threat to some kits, but Castelli's Tutto Nano Bib Knickers excel when conditions are variable. They offer the perfect in-between coverage with knicker length, plus the new Nano Flex 3G fabric that traps in warmth that's soft against the skin, but light enough to breathe, so you don't have to overheat. And for those intermittent showers, Nano Flex 3G also packs in exceptional water protection to shed rain, mud, and wheel spray. On upper side, the knickers feature a light mesh bib that doesn't hold onto sweat, aiming to keep you cool while you hammer out the miles.

Castelli employs the KISS Air2 chamois on the Tutto Nano. This multi-density chamois is crafted with long miles in mind, and is contoured to offer elevated support to the ischial bones, while alleviating pressure to the perineum, reducing irritation from jarring road vibrations, and long hours in the saddle. The knickers are finished off with reflective inserts on the bottom hems to help boost low light visibility, and embossed logos that withstand the rigorous conditions of the road.


  • A knicker that aims to please no matter the condition
  • New Nano Flex 3G fabric is warm, soft, and water resistant
  • Trap heat inside with fleecy inner fabric
  • Reduced seaming elevates comfort of the fit
  • Mesh bib straps don't hold onto sweat, let heat escape
  • KISS Air2 chamois cushions sit bones for the long miles
  • Reflective accents at cuffs boost low light visibility
  • Item #CST00U5
Nano Flex 3G
spring, fall, winter
Recommended Use
road cycling
Manufacturer Warranty
1 year

Overall Rating

3 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 0 reviews

Fits Slightly Small

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4 out of 5 stars

April 11, 2023

Pretty Good Winter Knickers

I've put it through the wringer
Size Bought:
6' 3"

I'm on my second pair and wear them commuting an hour each way to work when temps are 30s & 40s... I pair them with over the calf winter wool socks. (I don't like full length winter bibs with ankle zippers.) I find they are not warm enough once temps get down into mid 20s. These are a solid set of comfortable kickers although I wish they'd upgrade the straps. I'm 6'3" tall an wear a XL as I do in just about all Castelli products.

Roy S
2 out of 5 stars

December 30, 2020

Nice quality but odd seam on backside

5' 9"

In general I'm a fan of Castelli winter bib tights and knickers as I think they provide good bang for the buck. Castelli winter gear is even harder than normal to sort out for fit, but I have found lately going up 2 sizes works for me (size XL instead of my usual M for euro fit cycling gear). Overall I liked the quality build of these knickers. But the deal breaker was a large seam that comes up the back of the thigh, crosses the butt area, and continues down the other thigh. The problem is the seam is quite thick (not flatlock), goes underneath the chamois, and for me just happens to cross right in that area of my sit bones and the business end back there, and I can feel it through the chamois. I've never seen this on any pair of cycling bottoms (and I've ridden on a lot of them).