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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, 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

100% merino wool
Recommended Use:
Manufacturer Warranty:
1 year

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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Great socks

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

Perfect height and beautiful design. Super high quality cooler weather sock that got me through this past winter when paired with the Castelli Toe Thingy and some overshoes when it got really cold. Fantastic moisture transfer as well. I wear a 44 shoe and the L/XL fits great.

Simply Awesome

  • Familiarity: I've put it through the wringer

Castelli is iconic in the cycling world. And their Quindici socks are one of the best things they make.

Made in Italy, the quality and looks of these wool socks is exceptional.

Wool insulates, vents sweat, and provides low/zero odor -naturally. Wool is a superfabric!

These are NOT just Winter socks. These are also -perfect- for use in the shoulder seasons (Spring/Fall) with your bibshorts and knee warmers. Accordingly, Castelli rates them for 23° all the way up to 60°F.

Quindici means 15; as in 15 cm high cuff. But these do eventually shrink down (vertically) about an inch.

Longevity/quality: I have 3 pairs that I have worn extensively for two seasons. They eventually pilled a little around the foot (as all wool socks do), but no holes. Mine have held up great.

Sizing: The sizing chart at the official Castelli website is best:
Cycling shoe size: 36-39 = S/M
Cycling shoe size: 40-43 = L/XL
Cycling shoe size: 44-47 = 2XL

I wear a size 45 in Shimano road shoes. The XXL fit perfect, especially after a few washings (wool does shrink a little).

Great socks

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

Well, they are socks. And they are warm. And comfortable. And fit correctly (I'm a size 47 shoe, XXL fits good). Uh, let's see, they look good too? That's pretty much it in a nutshell. Wool, comfy, good quality, yep, they work great!

Love. These. Socks.

  • Fit: True to size
  • Size Bought: XXL

I'm a size 14 and the XXL fit perfectly. Beautifully manufactured, and highest quality. They are a bit thicker than normal cycling socks, but I've been using them as a general winter sock in boots for more vigorous winter activities (sledding, clearing snow, etc...) as well as cycling. Warm toes= happy feet.

They are soft and comfy.

Castelli Merino Quindici Socks

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: 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: 0m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

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.

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.

    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.