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Castelli Rosso Corsa Pro 15 Sock Savile Blue
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Rosso Corsa Pro 15 Sock

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  (9 customer reviews)
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Compressive Cool Mesh — Rosso Corsa Pro

The best sock ever made for performance cycling, designed for every cyclist to enjoy. The Castelli Rosso Corsa Pro 15 Sock is a high-quality, cooling sock that keeps the foot comfortable after long days in the saddle. Fitted with cool mesh, a padded forefoot, compression midfoot, and even a reflective tab at the back.

Constructed with Meryl® Skinlife yarn, these socks feature unique antimicrobial silver ions that reduce the prominence of odor-causing bacteria. The 200-needle design allows for extra stretch, which fits your foot and won't fall mid-ride. A multiple-structure knit gets the right performance in every part of the sock, including a compressive midfoot support band that enhances circulation. With a cushioning pad under the ball of the foot, these socks deliver world-class power with comfort that lasts all day long.

The Castelli Rosso Corsa Pro 15 Sock has everything you need for a truly unforgettable ride. An asymmetrical construction mirrors the shape of the foot, so each sock is identified as either right or left. No more uneven wear and tear here! A reflective tab at the center back even promotes visibility so you can live it up when the lights go dim.


  • Multiple-structure knit to get the right performance in every part of the sock
  • 200-needle construction for extra stretch
  • Compressive midfoot support band
  • Asymmetrical construction to mirror shape of foot
  • Reflective tab at center back
  • Cushioning pad under ball of foot
  • Meryl® Skinlife yarns with antimicrobial silver ions to reduce odor

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Castelli Rosso Corsa Pro 15 Sock
    Other styles of this product are available.
    Shoe Size35-3940-4344-47   

    Fabric Type: Synthetic 


    Cuff Height: Crew 

    White - S/M

    Mfg PartNum: R4521026001-2 

    White - L/XL

    Mfg PartNum: R4521026001-4 

    White - 2X-Large

    Mfg PartNum: R4521026001-6 

    Black - S/M

    Mfg PartNum: R4521026010-2 

    Black - L/XL

    Mfg PartNum: R4521026010-4 

    Black - 2X-Large

    Mfg PartNum: R4521026010-6 

    Savile Blue - S/M

    Mfg PartNum: R4521026414-2 

    Savile Blue - L/XL

    Mfg PartNum: R4521026414-4 

    Savile Blue - 2X-Large

    Mfg PartNum: R4521026414-6 

    Belgian Blue - S/M

    Mfg PartNum: R4521026424-2 

    Belgian Blue - L/XL

    Mfg PartNum: R4521026424-4 

    Belgian Blue - 2X-Large

    Mfg PartNum: R4521026424-6 

    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Very comfortable and great breathability.
    by baribill85
    Cycling Enthusiast
    0 of 1 customers found this review helpful.

    I use these when I ride my road bike.

    Reviewed 7/12/2021
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    Disappointingly Small: Castelli Rosso Corsa Pro 15 Sock Review
    by The Bob
    Competitive Racer

    I recently purchased the Castelli Rosso Corsa Pro 15 Socks, hoping to add a touch of style and comfort to my cycling gear. As an avid cyclist, I understand the importance of quality socks, and Castelli's reputation led me to have high expectations. However, I was left utterly disappointed as soon as I tried them on.

    The primary issue with these socks is their size, or lack thereof. I typically wear a size large in cycling socks, so I ordered the corresponding size (XXL) for the Castelli Rosso Corsa Pro 15 Socks. To my dismay, they turned out to be far too small for my feet. Even after carefully following the size chart provided by the manufacturer, the socks felt uncomfortably tight and restricted.

    The sizing issue is not just a matter of personal preference but a significant flaw in the product. The socks are simply not designed to accommodate a wide range of foot sizes. This is quite surprising considering Castelli's reputation for producing high-quality cycling apparel. It's frustrating to invest in a product that is supposed to enhance your cycling experience, only to find that it fails to provide the basic comfort and fit required for a long ride.

    On the positive side, the socks do provide decent moisture-wicking capabilities, which is crucial for keeping your feet dry during intense rides. The breathable mesh panels also aid in ventilation, preventing excessive sweat buildup. However, these positives are overshadowed by the glaring size issue.

    In conclusion, the Castelli Rosso Corsa Pro 15 Socks are a letdown due to their extremely small sizing. While the moisture-wicking properties and breathability are commendable, these positives are not enough to justify the high price when the fundamental aspect of fit is so poorly executed. If you have larger or wider feet, I would strongly advise looking for alternative options that offer better sizing options and a higher quality material.

    Reviewed 5/25/2023
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    Superb, Well Made Sock
    by Matthew
    Southern California

    Firstly, they run small. I wear a 42 Sidi shoe, but wear a L/XL size Castelli sock. All their socks are high quality and look great. From these "summer" socks, to the thicker wool-blend socks, I am a customer for life when it comes to Italian-made Castelli socks.

    Reviewed 3/27/2023
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    Socks run very small
    by Bruce
    Competitive Racer
    Evergreen, CO

    I own several Castelli bib shorts and several jerseys. Generally I find them excellent. These socks, however, run very small. I bought size L/XL, per the size chart. I wear an 8 1/2 size shoe. When I tried to pull the socks on they ripped up the side. Tried the other one and it ripped too. I don't believe I used excessive force or was careless, especially when I tried to pull on the second one, but the socks were very tight. I should have returned them but didn't want to put up with the hassle.

    Reviewed 7/14/2022
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    The king of socks.
    by Laszlo
    Las Vegas

    Perfect comfort,and design. Perfect choice!

    Reviewed 2/17/2023
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    Once it's on, it's fine
    by Art H.
    Cycling Enthusiast
    Erie, CO

    The socks are quite comfortable, once they're on. They are a tight fit, however, and even though they are right and left foot specific, they are hard for me to get on. Maybe my difficulties are age related, but I think anyone would have a bit of a struggle getting these on. Once on, though, they do a great job of keeping the feet cool.

    Reviewed 6/23/2022
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    Nice socks, run small
    by Anonymous
    Cycling Enthusiast
    Wasatch Front, Utah

    I bought the xxl as I wear a size 46 shoe. These barely fit and are hard to get on. But they work very well once I'm in my shoes and on my bike. A little pricey, I thought.

    Reviewed 8/29/2022
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    Castelli Rosso Corsa Pro 15 Sock
    by joeBiker
    Cycling Enthusiast
    Hayward, WI
    1 of 1 customers found this review helpful.

    Castelli Rosso Corsa Pro 15 Sock are great socks did a 80 mile road ride and feet felt great very comfortable

    Reviewed 7/1/2021
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    Good quality, comfortable
    by New Holland
    SE Pennsylvania
    1 of 1 customers found this review helpful.

    Like the light weight and the height is good

    Reviewed 6/29/2021
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