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Product Images

Castelli Como 20 Thermal Sock White
Castelli Como 20 Thermal Sock Black
Castelli Como 20 Thermal Sock Belgian Blue
White
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Castelli Como 20 Thermal Sock 1
Castelli Como 20 Thermal Sock 2
Castelli Como 20 Thermal Sock 3

Castelli Como 20 Thermal Sock

(3)

Pricing and Order Section

Mfg PartNum:
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MSRP: $28.00
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Description

Racking up Miles When the Temperature Drops

The Castelli Como 20 Thermal Sock is made with PrimaLoft® yarn for warmth and moisture transfer in a mid-weight construction with a 20cm high cuff, perfect Fall and mild Winter riding.

Features:

  • PrimaLoft® yarn for warmth and moisture transfer
  • Mid-weight, fits comfortably in a cycling shoe
  • 20 cm cuff height

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.

Size Chart

S/ML/XLXXL
Shoe Size
35-3940-4344-47   

Specifications

Fabric Type: Synthetic 

Cuff Height: Crew 

White - S/M

Mfg PartNum: R4525564001-2 

White - L/XL

Mfg PartNum: R4525564001-4 

White - 2X-Large

Mfg PartNum: R4525564001-6 

Black - S/M

Mfg PartNum: R4525564010-2 

Black - L/XL

Mfg PartNum: R4525564010-4 

Black - 2X-Large

Mfg PartNum: R4525564010-6 

Belgian Blue - S/M

Mfg PartNum: R4525564424-2 

Belgian Blue - 2X-Large

Mfg PartNum: R4525564424-6 

Belgian Blue - L/XL

Mfg PartNum: R4525564424-4 

Reviews

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Reviewed 1/28/2026
by Anonymous
Cycling Enthusiast
San Diego, CA
Value Rating
Overall Rating
Good sock and thicker than the Castelli Espresso sock but

Perfect sock for our mild San Diego winters, but maybe not thick enough for colder climates, unless you pair it with a pair of shoe covers.

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Reviewed 1/8/2026
by Christian
Tequesta, FL
Overall Rating
Excellent Mild Weather Sock

Love the softness, compression, and length. Perfect sock for when it's not too cold and not too warm.

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Reviewed 1/8/2026
by Christian
Tequesta, FL
Overall Rating
Excellent Mild Weather Sock

Love the softness, compression, and length. Perfect sock for when it's not too cold and not too warm.

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Thank you for your feedback.
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