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CastelliQuindici Sock


Item # CST0352

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Item # CST0352

Quindici Sock

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.

  • Soft and toasty socks for chilly winter rides
  • Wool construction traps heat, wicks sweat, dries
  • Breathable fibers let sweat escape on the ride
  • Fight odors naturally with wool threads
  • Tall cuff keeps you covered from icy gaps
Tech SpecsSize
Tech Specs
100% merino wool
Recommended Use
Manufacturer Warranty
1 year


US MEN'S SHOE SIZE 4 - 6.5 7 - 10 10.5 - 13
EU MEN'S SHOE SIZE 36 - 39 40 - 43 44 - 47
US WOMEN'S SHOE SIZE 4 - 7 7.5 - 9.5  
EU WOMEN'S SHOE SIZE 35 - 38 39 - 41  


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Favorite socks

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

These are great, comfortable, warm and soft. Very good socks, and another item I look to wear on each ride in the winter.

Great winter socks

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

I got these socks for my husband to wear in winter here in New Jersey. They are comfortable for him down to about 30 degrees. They are very comfortable, well made and warm!

Could be my favorite sock

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Large

Very happy with this sock. My 10.5 - 11 size foot really likes the large size and the little extra thickness. My current socks are all fairly thin. Haven't washed it yet but even with a little shrinkage I think the fit will be fine. Length is about 2-3 inches above my ankle bone - perfect.

warm and comfortable

  • Familiarity: I've put it through the wringer

Castelli makes my favorite cooler weather socks. There are other warm socks out there but I think Castelli makes them more comfortable than any I've tried. Have owned several of their cool weather socks now and the Quindici live up to what I expect from them.

Love these socks!

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

I bought a pair of these socks and was super impressed. Soft, warm, and breathable. Loved them so much that I purchased a few more pairs.


  • Familiarity: I've used it several times

This a great winter and fall sock! Great for colder weather, they keep me very warm and the merino wool is super soft and comfortable to the skin! Would definitely recommend!

Excellent Fall/Winter Sock!!!

    Love these socks! Extremely Warm and Breathable! I wear a size 9.5 shoe and the L/XL fits perfect.

    MVP of the Sock Drawer

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

    These are my favorite socks for all winter activities: nordic skiing, running, and of course riding. The Quindici sock packs some powerful warmth in a still slim sock. I have a few pairs, which have all held up quite well through several seasons of routine winter use. They are super comfortable and true to size.

    The reference road sock for Winter

      Castelli is located in the foothills of the Italian Dolomites. They know Winter cycling. 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 from 60°F down to freezing (with shoe covers).

      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).

      Best Winter Socks Ever

      • Familiarity: I've used it several times
      • Fit: True to size
      • Size Bought: L/xl

      If you can, grab some Merino wool socks from Castelli. Thick. Warm. Little puffy clouds for your feet. Mmmm.

      great cool weather sock

      • Familiarity: I've put it through the wringer

      Work really well in fall and spring. if it heats up a little you won't sweat to death. kept feeling warm down to about 45 deg. in a regular shoe. I was fine a little lower but my wife had cold toes any lower.

      Must have sock

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

      I wear a size 43-44 in the majority of cycling shoe brands, and the L/XL fit perfectly. I have worn these socks multiple times road riding as well as mtb in temperatures down to 35 and up to 70. Because it is wool, it works great for cool weather, but do not count it out when it is warmer out. Very breathable sock that vents heat and sweat from your foot very well. It is a great all around sock that will accommodate all kinds of conditions and types of riders. One of my pet peeves is a sock that slides down while riding. The ankle cuff wraps your ankle nicely and has a very durable feel. Simple yet versatile and effective socks. Spend the few bucks and grab yourself a pair, you won't regret it.

      Feel free to contact with any questions!
      Michael Walker - Customer Account Manager

      Holy Socks

      Got a toe hole on my tenth (approximately) ride. Very comfortable and quite thick, but not a durable performance sock.

      Holy Socks

      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.

      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.

      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.