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  • Castelli Incendio 2 18 Sock
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CastelliIncendio 2 18 Sock

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Item # CST00O1

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Incendio 2 18 Sock

Packing that unmistakable Castelli style and designed to keep your feet warm on those winter rides comes the Incendio 2 18 Sock, bringing you some extra cuff height and providing plenty of coverage on chilly rides. The 18cm height is just over 7-inches so you won't have frozen shins when paired with knee warmers or kickers in your cold weather kit.

Made from a soft blend of wool and insulated PrimaLoft fabrics, these socks will keep the chill off your feet while still breathing well so they don't become a cold, clammy mess. Under the forefoot, a terry cloth pad adds a touch more comfort and an extra layer of warmth without being that it makes your shoes feel uncomfortably small.

  • Insulated socks for chilly rides
  • PrimaLoft and wool blend provides breathable warmth
  • Terry cloth under the forefoot increases insulation
Tech SpecsSize
Tech Specs
PrimaLoft, wool, [under forefoot] terry cloth
Recommended Use
casual, commuting, cross-country, cyclocross, gravel, road cycling, trail
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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Comfy & Functional

  • Familiarity: I've used it several times

Works well for jogging, cycling, and even skiing. My normal 'go-to' sock for several years for all activities is Smartwool -- their merino wool is tough to beat. The Castelli though is very close, and just as functional. Since, in winter, in the great state of Utah you can ski and bike the same day, I tried this sock and is worked very well for both. I hate thick padding, but this one has just enough w/o being too thick (hot). So far, sizing is spot on, and I've used them comfortably for cold, rainy cycling, and of course, temps down into the teens w/ no issues (in ski boots). Bought 3x more pair.

Great cold weather sock

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

This is my favorite cold/cool weather sock. It is not too thick but obviously is not as thin as my summer socks. I like the combo of wool and primaloft. Does what it is supposed to do and that is keep my feet warm. With a pair of overshoes going down below 32F is no problem.