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Castelli Primaloft Sock

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SKU CLCX555110-S/M

PrimaLoft® polyester fibers and 20% silk are blended together to supply excellent thermal regulation, moisture management and breathability. The versatile fabric blend makes these socks comfortable year-round, whether you're doing long rides or roaming around town.


  • PrimaLoft® synthetic insulation provides outstanding warmth with excellent moisture management
  • 20% silk for extra softness
  • Reinforced toe and heel areas
  • Weight:76g