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Primaloft 15 Sock

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A superior cycling sock that boosts any ride.

Isaac Newton knew best when he said that a body in motion stays in motion. So, what better gear for your active needs than the Castelli PrimaLoft® 15 Socks.

Created from an incredible blend of PrimaLoft® and polypropylene yarns that is sure to keep your feet comfortable and dry. A terry-cloth construction provides extra loft and warmth, taking your ride from good to great in a flash. A height of 15cm makes these cycling socks great for all of your bicycling needs, protecting your ankles from harm while maintaining a consistent temperature.

The Castelli PrimaLoft® 15 Socks live and breathe high-performance by providing unmatched comfort and superior craftsmanship. Rocking your ride can be a challenge, so decide on a sock that is born for the bike.


  • Mixture of PrimaLoft® and polypropylene yarns to keep your feet warm and dry
  • 15cm height for extra warmth
  • Terry-cloth construction for extra loft and warmth

  • B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


    Cuff Height: Crew 


    Fabric Type: Polyester/Spandex blend 

    Ordered by Most Relevant First
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    1 stars
    Nice styling, good socks
    by Anonymous

    Love the way these socks look and feel.

    Reviewed 11/23/2020
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