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Castelli Duo WS Sock

This unique sock offers a two panel construction (hence the name Duo) with a windstop front. This duality brings comfort and performance to cold and windy days on the bike. The revelation of this product is so great that discovery of windstop socks for some riders is much akin to listening to the Beatles for the first time.

Two panels construction looks something like this. The back panel is thin and elastic nylon to provide and snug fit. The front panel as expected is Gore Windstopper X-Lite fabric. This wonderful and slightly magical fabric has qualities that allow complete wind blockage with persperation flow which prevents your hoofs from getting wet and clammy. These two panels are stitched together using flat surged seams so they lay perfectly flat. This guarantees joining of these panels to be seemingly seamless. Tall cuff has an elastic band inserted at the top to keep the Duo WS in place. Add a thermal bootie over these and up your game even more for arctic conditions. No matter how you slice it, these socks have winner written all over them.


  • Windstopper X-Lite fabric
  • Elastic nylon rear panel
  • Flat stitched seams
  • Wind proof but breathable
  • Tall cuff with elastic top
  • Choose size

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Reg Price $49.99