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Castelli Quindici Socks


Item # CST0352

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  • Anthracite, S/M ($19.95)
  • Anthracite, L/XL ($19.95)
  • Anthracite, XXL ($19.95)
  • Black, S/M ($19.95)
  • Black, L/XL ($19.95)
  • Black, XXL ($19.95)
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Item # CST0352

Merino means quality.

Made from 100% merino wool, Castelli Quindici Soft Socks are the ideal choice for long winter rides in cold and windy conditions.

By now you've hopefully learned the merits of wool. A traditional material renowned for its softness, merino wool keeps your feet warm and comfortable while letting moisture evaporate. This breathability is especially important for cyclists, as winter months often mean cramming socks into shoes and shoes into booties. Without a means by which moisture can escape, your feet become colder faster; making wool socks an important cold-weather companion. Wool is also naturally odor-resistant -- a nice bonus.

Thanks to a tall 15cm cuff, Castelli Quindici Soft Socks also offer outstanding ankle coverage, so you won't have to worry about a thin strip of exposed skin between your tights and socks. They're available in Anthracite and Black and come in three sizes -- Small/Medium, Large/X-Large, and XX-Large.

Tech Specs

Recommended Use:
cold weather cycling, running

Size chart



Castelli Socks
US Men's shoe
4-7 8-10 11-14
US Women's shoe
5-7 8-10 11-12
How to Measure:
For best results, take measurements over your underwear.

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Here's what others have to say...

5 5


  • Familiarity: I've put it through the wringer

These Castelli socks are a work of art. The quality is 10/10. Made in Italy.

Quindici means 15 (as in 15 cm high cuff); though they really don't seem quite that tall. Anyway, a great sock for Fall/Winter use. These work --great-- with Fall knicker bibs or with Winter biblongs.

These socks are perfect over a wide range of cool/cold weather: say 25-55* (wear booties in rain or freezing weather, of course). I often use the slightly thinner Castelli "Merino" sock (9 cm tall) in 50-60* weather.

Wool offers the best wicking material and zero odor (naturally). Wool is a superfabric!

They look awesome in either color.

Sizing: I wear a 45.5 shoe in Sidi (10.5-11.0 USA). I bought a pair of these socks in both L/XL and XXL. The L/XL just fit. The XXL fit better. If you wear a 45+ shoe, definitely buy the XXL.

5 5

Warm socks

  • Familiarity: I've used it several times
  • Fit: True to size

Warm for cold weather cycling. Good product

5 5

Castelli Merino Quindici Socks

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Height: 6' 0"
    Weight: 165 lbs
    Size Purchased: XXL

I used these only once, with a pair of thin synthetic Pearl Izumi socks under them. My feet were warm, 40 degree temperatures, 4 hour ride. I usually wear a size 12 or 13 American shoe size, and I bought the XXL size . They fit fine, not very long up the calf, and not any extra in the toe, but I expect they will stretch out a little. They felt comfortable, and warm Recommended.

Avg. ride time: 1h 33m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.
5 5

Perfect cool weather socks

  • Familiarity: I've used it several times

Comfortable, warm, perfect fit, great quality.... I wouldn't change a thing. These are the perfect socks for cool weather rides that aren't cold enough for shoe covers. Next time they are on sale I'll buy several more pairs.

5 5

Nice socks - chapeau Castelli!

These are nice socks. Especially when you can get them on sale. Durable, well made and warm.

4 5

Castelli Quindici Sock

These socks are great. 150cm lenght and materials kept my feet warm. As for the toe box, holes all over the place. No! I don't have oyster shells for nails. Castelli could use kevlar materials in the toe area.

5 5

Love these socks!

Been wearing these socks for long rides on cooler, fall Colorado days. I'm a firm beleiver that socks make a huge difference in making my ride comfortable. These socks stay in place, don't provide any friction, and keep my feet warm, but not too hot. I plan on buying several more pairs if I see them on sale again.