A/C Bib Short - Men's
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Beat the heat with breathable bibshorts built for high-performance summer rides
What Our Gearhead® Experts Are Saying:
"I can’t believe how effective the A/C Bibshort is at keeping me cool in peak summer heat. The mesh construction doesn’t sacrifice support, and the seamless chamois feels great even on century rides. It’s the perfect companion for warm-weather training."
Hot summer rides call for exceptional gear, and the Castelli A/C Bibshort is our answer to rising temperatures. Engineered with closed-knit mesh panels, this bibshort delivers remarkable airflow, keeping us cool and dry even when the road feels like an oven. The Progetto X2 Air Seamless chamois combines dual-layer cushioning and a skin-care layer for a plush, chafe-free fit, letting us ride longer with complete comfort.
The tailored fit and lightweight build enhance aerodynamics without restricting movement, while the silicone leg grippers ensure everything stays securely in place through every mile. Designed for temperatures ranging from 71 to 104°F, this bibshort lets us perform at our best, whether climbing steep gradients or flying along flat stretches. Ride confidently under the sun with UPF 50+ protection built right in.
Details
- Summer cycling bibshort for hot and humid rides
- Closed-knit mesh panels maximize airflow and breathability
- Progetto X2 Air Seamless chamois pad ensures all-day comfort
- UPF 50+ rating protects skin from harmful sun exposure
- Lightweight and tailored design supports an aerodynamic fit
- Silicone leg grippers keep bibshort securely in place
- Item #CSTZ7WL
- Season
- summer
- Fit
- form-fitting
- Chamois
- Progetto X2 Air
- Bib
- mesh
- Leg Gripper
- silicon
- UPF Rating
- 50+
- Claimed Weight
- 7.2oz (203g)
- Activity
- cycling
- Manufacturer Warranty
- limited 2 years
Reviews
Q&A
What do you think about this product?
Overall Rating
3.5 based on 3 ratings
Review Summary
Fits Small
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.View
Selecting an option will reload the available reviews on the pageJuly 14, 2025
They work for the heat but looks ?
- Familiarity:
- I've used it several times
- Size Bought:
- XL
- Height:
- 5' 8"
- Weight:
- 179
I live in Florida so I test "summer" riding gear all year. These do work for the heat quite simply because the panels on the sides of your quads are a "mesh" type material. Not enough that you look indecent or like a weirdo, but your skin tone does slightly show through. I guess depending on your skin tone it is more apparent and visible on lighter skin riders. Regardless, they do work even if just in your mind because they do feel breathable due to their mesh type construction. I purchased one color and coming back for the other as I am pretty pleased with their performance.
July 7, 2025
Cooler in hot humid weather
- Familiarity:
- I've used it once or twice and have initial impressions
- Size Bought:
- M
- Height:
- 5' 9"
- Weight:
- 155
I wanted a pair of bib shorts for a hot humid ride. These were the only ones I could really find. The fit was a little weird, but all in all I’d say it works. I wasn’t as hot as I am in my regular bib shorts.The top of the shorts is a little lower and the leg length is a little shorter than my other bib shorts. The chamois was excellent. My only complaint is the shoulder straps. They don’t exactly disappear while you’re riding. One star off for that.
June 8, 2025
Length won't stay; rides up
- Familiarity:
- I've put it through the wringer
- Size Bought:
- L
- Height:
- 5' 9"
- Weight:
- 180
First off, typical Castelli sizing: needed a L (where normally would wear M). Issue I have with them is that the legs won't stay pulled down; thighs ride up in no time. Seems like it has a good thigh grip... so I believe the problem is with the meshy material along the side; it wants to "bunch up". Otherwise good bib shorts. Castelli needs to make these longer though. Can't recommend as they are; won't buy this version again.
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