Castelli Thermolite 9 Sock

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Highlighted Features

  • Thermolite hollow-core fabric
  • 9 cm cuff

The Thermolite Sock is made for those in-between conditions when you need some extra warmth but still require a sock that can breathe well. Thermolite fabric insulates and manages moisture to keep you dry and comfortable. The Thermolite hollow-core polyester fibers bring plenty of warmth when the temperature drops and the flat-knit construction reduces bulk for an ideal fit with your shoes.