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Castelli Free Kit 13 Sock

Item # CST00KU

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  • Select options
  • Anthracite, XXL ($17.95)
  • Dark Infinity Blue, XXL ($17.95)
  • Forest Gray, XXL ($17.95)
  • Dark Infinity Blue, L/XL ($17.95)
  • Red, XXL ($17.95)
  • Forest Gray, S/M ($17.95)
  • Forest Gray, L/XL ($17.95)
  • Red, S/M ($17.95)
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Item # CST00KU


Kit up.

The Castelli Free Kit 13 Socks epitomize clean, race-ready style with century-conquering comfort and an of-the-moment cuff height. Made from durable, quick-drying Meryl Skinlife yarns, this sock whisks moisture away from your feet as you ride and keeps offensive aromas at bay on especially hot days. Castelli adds a supportive band across the arch and uses a medium compression knit throughout the sock's body to prevent bunching or chafing as you ride.

Tech Specs

Meryl Skinlife
Recommended Use:
road cycling
Manufacturer Warranty:
1 year

Size Chart


US MEN'S SHOE SIZE 4 - 7 8 - 10 11 - 14
US WOMEN'S SHOE SIZE 5 - 7 8 - 10 11 - 12

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Looks nothing like photo, still nice.

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

Like most Castelli socks these are nice looking and comfy. Very lightweight, lightest cycling sock I've got so far. Good height on calf. They are pretty stylish, however, I'd like to point out the stock photos look ABSOLUTELY nothing like the colors on the actual product. That being said I'm still keeping them to satiate my sock fetish. Those are the Forest Green on the top and Dark Infinity Blue on the bottom. Sizing is pretty accurate but if you are a 10.5 I would still probably get XXL.

Looks nothing like photo, still nice.