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  • Castelli - Nano Flex Pro Bib Tights - Men's - Black

Castelli Nano Flex Pro Bib Tights - Men's

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    9 Reviews


    Go Nano.

    Rumor has it Castelli is working on a portable pedal-powered force field that will protect you from rain and wind when you're riding, but it's still in the test phase, so they wheeled out the new Nano Flex Pro Bib Tights to keep you dry while they run through some more R&D. It's a simple, elegant solution to a difficult problem: how do you stay dry when you're riding in a rainstorm?

    The obvious answer is "Wear hard-shell rain gear", but that leads to sweating and eventually sogginess. To prevent sweat buildup, Castelli built the Nano Flex from the fabric of the same name, a stretchy, warm, and soft blend of polyester and spandex, and then infused it with silicone nanofilaments, which make the fabric virtually waterproof without inhibiting breathability.  Accordingly, you can wear the Nano Flex Pro on its own when its drizzly or under Castelli's new Tempesta Pants — which are a more traditional rain shell — when conditions are really bad.

    On the thighs, knees, and rear, Nano Flex Light overlays provide extra water resistance, while a waterproof and reflective band at the inner leg keeps wheel spray away from your legs and ankles. All the Nano Flex's panels are joined with reduced seams to eliminate bulk and discomfort, and Castelli's Progetto X2 Air chamois keeps you comfortable in the saddle even if the ride is grueling and the weather straight up nasty.

    • Foul-weather cycling tights for staying dry in the rain
    • DWR-treated material repels water while breathing
    • Chamois included for comfort through base miles
    • Reflective details help keep you visible under overcast skies
    • Item #CST008V

    Tech Specs

    [body] Nano Flex (polyster/spandex blend), [thigh, knee, and seat overlays] Nano Flex Lite
    yes, Progetto X2 Air
    Recommended Use
    Manufacturer Warranty
    1 year

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

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    Awesome tights for Winter

    • Familiarity: I've put it through the wringer
    • Fit: Runs small
    • Size Bought: L
    • Height: 6'
    • Weight: 170lbs

    Together with my Alpha RoS jacket I have THE solution for Winter and cold crummy Fall rides. The old Gabba left my quads cold if it was raining but not these tights..! Great investment for serious roadie!

    Essential, supreme winter kit

    • Familiarity: I've used it several times
    • Fit: True to size

    These are designed really well. The seams are all anatomic and perfectly form fitting. They are impervious to wind and really keep you comfortable.
    They are awesome in biting cold up to 50F-60F (if the wind is cold)
    The thin straps allow your layers and upper fabrics to breathe while protecting your entire lower body in comfort.
    The reflective panel is fantastic- totally waterproof and really great safety feature.
    The fit is pro too. I love it. Totally protects you and looks the business and doesn't bunch or move around.
    The Castelli scorpion roundel on the butt is a rubber logo, so it won't peel or flake off.
    Zippers are high quality and lock when flat, so they keep the legs from riding up.
    These are a revelation for cold weather riding. No more suffering with bodging knee or leg warmers for me!
    I look forward to riding in warmth and comfort.

    The Pro Castelli fit (race fit) is true to size according to the size chart.
    175cm/62kg ordered size small.

    Marvelous tight

    • Familiarity: I've used it several times
    • Fit: Runs small

    A size large fits me just about perfectly at 5’10” 160 lbs. It is more or less long for my shorter legs and barely bunch up at the ankle standing up. But when in a riding position, the material stretches out nicely going unnoticed. It is a surprisingly tight fit on the ankle when zipped all the way down. It takes some force to zip it over a wool sock, you feel plenty aero with this on. It is nice and snug from my torso down to my calfs. As far as Castelli sizing goes, this is a slimmer fit. Sometimes size large in Castelli can be very slightly on the loose side for me, but this piece happens to be a great fit. It is a very comfortable tight with plenty of flexibility and a cozy soft fabric throughout the entire inside. When water and snow from my front tire sprays my legs from a wet road, I don't feel a thing as it beads up and stays on the outside. The lower inner leg is often the first part that becomes soaked through. The silver outside is completely waterproof to avoid this while adding a nice reflective design.

    Overall, it is a very warm piece and great when temperatures fall toward freezing outside. The knees, thighs, and rear have the extra layer of Nano Flex Light over the base fabric making it extra heavy duty. Just the physical feel of it makes this sucker scream warmth. I will continue to wear this tight in temperatures up to 50 F on the road as I was very impressed with how breathable the bib was when it became warmer than planned. Unlike many hardshell pants out there, these prevent discomfort from all of the heat created from hard efforts by allowing a heat release. The mesh straps and thin upper material help with this. The Progetto X2 Air chamois is fantastic and built for all day comfort. Overall, I love the tight and will be an essential piece throughout the lower temperatures and rainy weather. I have worn it on dry sunny days and drizzly overcast evenings and can assure you it is made for the cold. For someone looking to invest in a warm and durable tight to get outside when it is much less than ideal outside, I highly recommend this.

    Please to reach out with any questions!
    Michael Walker - Customer Account Manager

    Stood up to the hailstorm

    • Familiarity: I've used it several times
    • Fit: Runs small
    • Size Bought: M
    • Height: 5'8"
    • Weight: 140lbs

    Have worn these a few times in iffy weather, but today got totally slammed by a hailstorm halfway into a 3 hour ride. Did an hour in rain and hail, temp low 40s, and the bibs kept me dry and warm. If they hold up well, they are worth every penny.

    Look Like a Superhero

    • Familiarity: I've used it several times
    • Fit: Runs small
    • Size Bought: Large
    • Height: 5'8"
    • Weight: 160lbs

    The other reviews highlight well the strengths and challenges of these bibs. Worth repeating is that the chamois in the seat and the brushed layer inside the legs makes these bib tights very comfortable to wear. The reflective covering on the lower legs provides extra confidence on dark rainy bad traffic nights, and is easy to wipe clean of mud and leaf particles. The extra wind protection of the "pro" version proved to be adequate for a 5 mile commute home in mid 40 degree temps with wind gusts of up to 50 mph. Combined with a LS Gabba 2, these bib tights are a great fit for those dark and stormy nights.

    Sizing is a bit of a challenge, here is what I noticed. My Free Aero Race shorts fit great (comfortable compression) in a medium. Same with my jerseys. I ordered both medium and large nano flex pro tights. I could (eventually) put on the medium size, but getting them over my calves was difficult, and I couldn't fully close the zippers over my ankles. What is odd is that everything else fit fine on the medium version. The large was just slightly larger than the medium, and was fine in the calves and ankles. Take-away: The determining factor for fit in these tights is most likely to be.... the size of your ankles and calves. I second the idea (expressed below) of ordering two sizes and returning the one that does not fit.

    Finally, if you are a fan of Spiderman or Superman, take note of the fact that my wife suggested (in jest) that the reflective covers on the calves make one look like a superhero in these tights. I just can't unsee that image any longer.

    best rain tights ever

    • Fit: Runs small
    • Size Bought: small
    • Height: 5'5"
    • Weight: 132lbs

    Live in soggy Pacific NW,I used nano bib tights past 2 years, shoes and legs always wet after 1/2 hr. The "pro" tights are amazingly better, with brushed feeling fabric against skin, wind barrier on thighs, and impervious reflective "gaiter". combined with Castelli rain covers, shoes and legs dry after 2 hours in deluge! Love them down to 35d. Will save old nanoflex for spring/fall as they are ok for mist only... Get some if you hate being wet!!

    Fits Like Skin - Warm - Handsome

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: Runs small

    Ok - Regular Castelli is 1x Smaller.. PRO Castelli is really 2x ~2.5x Smaller. DO NOT consider buying this garment if your not truly slim to begin with. You will not be happy with this. If you have to think about what that means for a moment then fugetabout it, this here bib/tight, ain't fo' you.. if your on the slim side go up 2 sizes, and lay off the pizza.

    This my 2nd Castelli bib. The other is a Large NON-Pro short bib, it. fits great. I purchased an XL in this garment it also fits great albeit snugly at the calves. (for contrast all my other bibs and tights are Garneau and they are all Medium.

    The calve zipper is longer then I need to be which I attribute to XL size inseam being a bit longer than my 32" inseam requires. Everywhere else was good. The inside is faced with a fleecy material and the chamois 1st rate. The straps have a rubber/silicon no-slip material facing them. I had on a thin liner so the straps where a bit fussy getting them to lay flat. I purchased through Amazon and got a great price. I am hoping to get out in these and in a Gabba2 (XL) I snagged a few weeks ago for a cool weather ride in during the holiday. I can't speak to the water shedding ability yet.

    Great if you buy the correct size

    • Fit: Runs small

    Castelli is expert at bad weather and Winter cycling.

    The brilliance of these bibtights is the gray waterproof fabric used at the front and around the shin. This design prevents front-tire wheel spray from constantly soaking your tights around the lower leg. In conventional tights, with bottom cuffs tucked in, this water seeps down to your socks (capillary action), then soaks your feet. Riding with cold, wet feet is awful.

    *These tights prevent all this if you wear the bottom cuffs OVER your winter booties.

    So, if you are riding on wet roads or in the rain... remember to zip the bottom cuffs of these bibtights OVER your waterproof booties; so that the water is directed OVER your booties and away.

    I can highly recommend the following winter booties for riding in wet weather: Pearl Izumi WxB or Castelli Poggio or Castelli Tempesta.

    ***Sizing: With Castelli kit, usually size up +1 from your normal street size. Italian sizing is different. Here, tho, size up +2. Trust me, I'm not kidding. They will still be snug.

    Best recommendation: Buy two sizes. +1 and +2. Keep the ones that fit best. Return the other (with tags on, etc, of course).

    insanely small size

    • Familiarity: I returned this product before using it
    • Fit: Runs small
    • Size Bought: XL
    • Height: 6'4"
    • Weight: 190lbs

    I'm 6'4" tall and thin (35" waist) about 190lbs. I could barely get the XL on. I am used to Castelli sizing their gear a size or two small, but this was crazy. I couldn't even zip the calf zippers, and I have pretty narrow calves.. Size up one or two sizes... I wanted to like this, but the fit was just crazy.

    Yes, size up +2. Italian sizing -is- different.

    And... @Guy, I don't think it is a bad design. It is a great design. Just no design can fit every body type.

    Tip (online shopping reality): Order two sizes. Return the one that does not fit. (Or both if neither fit.) CC has an easy return procedure. Ride dry and happy out there!