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  • Castelli - Gregge 15 Sock - Black/Giro Pink
  • Castelli - Gregge 15 Sock - Black/Red
  • Castelli - Gregge 15 Sock - Dark Blue/Gray

Current Color

  • Castelli - Gregge 15 Sock - Black/Giro Pink
  • Castelli - Gregge 15 Sock - Black/Red
  • Castelli - Gregge 15 Sock - Dark Blue/Gray

Castelli Gregge 15 Sock

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sale from $13.96 $19.95

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    • Black/Giro Pink
    • Black/Red
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    2 Reviews


    Gregge 15 Sock

    Your rides run the gauntlet from too warm to too cold, and you don't shy away from your bike because of a little drizzle. The Castelli Gregge 15 Sock is constructed of a merino wool blend that naturally regulates temperature and manages moisture—standing up to both perspiration and precipitation. The blend is soft and flexible, and it's constructed with a reinforced toe and heel for extra durability. A thicker footbed cushions your foot against the stiffness of your shoe and improves warmth retention to minimize chills.
    • Cycling socks for all weather conditions
    • Merino wool blend is soft and manages moisture
    • Thicker footbed improves warmth retention
    • Reinforced toe and heel enhance durability
    • Crew height provides coverage
    • Item #CST00J4

    Tech Specs

    70% merino wool, 15% nylon, 15% elastane
    Recommended Use
    road cycling
    Manufacturer Warranty
    1 year

    Tech Specs

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    • Fit: Runs small

    Castelli socks are iconic in the cycling world. Made in Italy, these socks are a work of art. The quality is 10 out of 10.

    I own several pairs of Gregge 15 and Castelli Quindici (15) wool socks. Love them both. The only difference I can tell is that the color schemes are different. Castelli officially rates them both for use in 60° F down to freezing weather (with shoe covers!).

    Sizing: The sizing chart at the official Castelli website is correct.

    Cycling shoe size: 36-39 = S/M
    Cycling shoe size: 40-43 = L/XL
    Cycling shoe size: 44-47 = 2XL

    I wear a 45 in Shimano. The 2XL fit perfect -especially after a few washings (wool does shrink a little). If you wear a size 45+ cycling shoe, definitely buy the 2XL.

    Nice sock for colder weather

    • Familiarity: I've put it through the wringer
    • Fit: True to size

    I bought these socks when I was buying several pairs at the begining of the riding season. These are great, a little on the thicker side so I like them on cooler days. Stay up well and super comfortable.