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Sweetspot 20 Thermal Sock
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The Sweetspot 20 Thermal Sock hits the balance between warm and light
What Our Gearhead® Experts Are Saying:
"I wore these on a string of cool morning rides, and they hit exactly the right balance of warm without feeling heavy in my shoe. My feet stayed comfortable the whole way through without ever feeling overdressed."
Getting the warmth level right on a cool ride can feel like a guessing game, and Castelli built the Sweetspot 20 Thermal Sock to take the guesswork out completely. We love how the PrimaLoft yarn strikes that balance, warm enough for a chilly start, light enough that feet never overheat once the effort ramps up.
Details
- Thermal sock built to balance warmth and breathability
- PrimaLoft yarn manages moisture while holding in heat
- Mid-weight build fits comfortably inside a cycling shoe
- 20cm cuff extends coverage further up the ankle
- Item #CSTZ860
- Material
- PrimaLoft
- Height
- crew
- Weight
- midweight
- Manufacturer Warranty
- limited 2 year
- Activity
- road cycling
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Frequently Asked Questions
How warm is the Castelli Sweetspot 20 Thermal Sock for cool-weather rides?
Its mid-weight PrimaLoft® synthetic yarns provide warmth and moisture transfer for cool-to-cold cycling; the listed weight is 63 g.Will the Castelli Sweetspot 20 Thermal Sock fit inside cycling shoes?
The mid-weight construction is designed to sit comfortably in a cycling shoe. Choose the size by shoe size; the listed men’s ranges are S/M for EU 35–39, L/XL for EU 40–43, and XXL for EU 44–47.How much lower-leg coverage does the Castelli Sweetspot 20 Thermal Sock provide?
The 20 cm cuff gives tall lower-leg coverage, making it a good option when you want a higher sock for cool-weather cycling.Does the Castelli Sweetspot 20 Thermal Sock manage moisture on winter rides?
PrimaLoft® synthetic yarns support moisture transfer while providing warmth, but this sock has no waterproof membrane or rating. For wet rides, pair it with weather-resistant cycling shoes or overshoes.How should I care for the Castelli Sweetspot 20 Thermal Sock?
Machine wash it at 30°C and tumble dry on a cool setting; avoid bleach, ironing, and dry cleaning to care for the PrimaLoft® yarns.









