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Rosso Corsa Pro 15 Sock

2 out of 5 stars
7 Reviews
$13.99 - $19.99
Up to 30% off
Color:Belgian Blue


Size Chart


Why We Like The Rosso Corsa Pro 15 Sock

Castelli claims the best sock they've ever made for performance cycling is the Rosso Corsa Pro 15 Sock. And, they might be right. It's constructed from multiple-structure knit with extra stretch and a compressive midfoot support band. An asymmetrical construction mirrors the shape of the foot, and Meryl Skinlife yarns with anti-odor silver ions reduce odor. A cushioning pad under the ball of the foot adds comfort, and there's even a reflective tab at the back.


  • Castelli's best performance cycling sock for discerning cyclists
  • Rep the brand's logo with a minimalist design
  • Anti-odor silver ions reduce odor to stay fresh
  • Asymmetrical construction mirrors the shape of the foot
  • 200-needle construction increases stretch
  • Item #CSTZ7HE
Meryl Skinlife
Manufacturer Warranty
1 year

Overall Rating

2 based on 7 ratings

Review Summary

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

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.
Runs smallTrue to sizeRuns large

What do you think about this product?


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1 out of 5 stars

March 11, 2024

Don’t Buy - Castelli Junk

I've used it once or twice and have initial impressions

I am a 11.5/12 in all shoes. I purchased the XXL based on the size chart. Upon first wearing prior to first washing I thought they were a little difficult to get on but once on they were a good precisian fit. Matching the “Pro” in the product description. I wore them one more time before first washing. I wash all my cycling kit in delicate garment bags only together and in cold water and air dry. After just one washing the socks shrank (cold water & air dry) I know this from the fact they were much harder to get on and I had to pull on the bottom of sock to get heal cup onto my heal. The calf tube of one sock had a fabric run. For you ladies think pantyhose run. At the end of a 43 mile ride upon taking them off that same sock with the run ran further. These socks are a disappointment and ended up in the trash can. This is just not acceptable for Castelli or Competitive Cyclist. If I was a one off that would be that. But, look at the amount of other poor reviews on this product. Save yourself from the headache and don’t buy.

Steve C

Originally reviewed on

1 out of 5 stars

September 20, 2023

Total Waste of Money

I've used it several times

I buy from this site all the time - love Competitive Cyclist. I also have a ton of Castelli product. However, these socks are a disgrace to the brand. Got XXL for my size 11.5 feet (size 44 euro). After 2 washes and air drying they shrunk to the point where they don't really fit anymore. Too small. Can't stop it from shrinking. Right/Left specific socks - what a joke. This product should be pulled from the web site.

Adam G

Originally reviewed on

2 out of 5 stars

March 18, 2023

Small even by Castelli standards

I've used it once or twice and have initial impressions

I have a lot of Castelli kit and I understand that it runs small, at least for Americans. These socks take it to another level. XXL is the largest they make and they're slightly too small for my size 13 feet. It's a bit of a struggle to pull them on but they fit acceptably once on. The toe seam is a bigger problem for me. I just can't get it to a comfortable place and that could be because the socks are so tight I can't adjust them. I'll keep the 2 pairs I bought but can't say I'd buy Castelli socks again.

David A

Originally reviewed on

1 out of 5 stars

January 6, 2023

Castelli socks

I've used it several times

Extremely disappointed. After several uses socks failed (holes). Don’t recommend it.

Alexander S

Originally reviewed on

3 out of 5 stars

May 11, 2022

SUPER small

I'm size 11.5/12 in shoes bought these in xxl being safe. Couldn't get them on my feet. Gave them to my 12 year old and still hard to get on but once on very nice quality socks.


Originally reviewed on

1 out of 5 stars

February 13, 2022

Poor quality

used the socks about half a dozen times and. once sock tore with a big hole and the other has a tear down the side already

Tarleton S

Originally reviewed on

5 out of 5 stars

April 24, 2021

just right for small feet

I've used it once or twice and have initial impressions

I wear like 40.5 to 41 shoe and finding a sock with a higher cuff length that also fits my foot can be tough. These are perfect! They are left/right specific with some subtle padding in the toe and foot pad area. That 15 cuff comes up right under to slight over the bottom of my calf with a snug fit.

Charles C

Originally reviewed on