Castelli Gregge Sock (Black / Red)

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Available on orders over $40. Collection in 1-7 days. WA orders 1-14 days. More info »

Free delivery over $99. Some exclusions apply. More info »

Up to 12 months interest free

Castelli Gregge socks are made of 100% merino wool, a natural high-performance fabric. They will keep you cool in warm conditions, and warm in cold conditions. Comfortable and breathable, they are the best investment you can make for your feet! Castelli Gregge socks also conform to road cyclist approved sock height standards. The merino wool keeps your feet warms whilst still allowing for evaporation. 


  • Full-length protection
  • 12cm Cuff
  • 52g (Pair)


  • 65% Wool
  • 30% Elastolefin(Olefin)
  • 5% Polyamide(Nylon)


MEN'S35 -394  -- 4344 - 47
WOMEN'S35 -3839 - 41 

Click here to see all Castelli Gregge socks.

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About Castelli

Castelli Cycling traces its roots back to 1876, as a tailor in Milan clothing organisations such as AC Milan, Juventus and the Milan Ballet. Castelli has a long history of high profile clients in cycling, and can be credited with introducing the first aerodynamic Lycra shorts worn by riders. Other technologies which are now common place in cycling apparel such as windproof garments, thermal clothing and sublimated prints were also pioneered by Castelli. Castelli continues to be at the forefront of high performance cycling apparel, with its garments being worn to victory by the world's top riders in events such as Paris-Roubaix and Giro d'Italia.

Check out our full range of Castelli Cycling Clothing here

Club 99 Membership

Join Club 99 for just $5 when you make a purchase in store, or use the button below to buy membership online. To reward you for being a club member, your Club 99 membership card will give you these great benefits:

  • Discounted Club 99 pricing, in store and online
  • A $25 gift card when you spend over $500 in a year *
  • Access to free bike maintenance classes
  • Exclusive priority access to new offers
  • Access to exclusive guarantees

Please note that when you buy Club 99 membership online, it may take up to 20 minutes to receive your welcome email.

* Click here for Club 99 terms and conditions.

Castelli Socks Sizing Chart

Shoe Size Small/Medium Large/Extra Large 2XL
Women (US) 4-7.5 8-10.5 N/A
Men (US) 5-6.5 7-10 10.5-13