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Cold Days 2nd Baselayer - Men's
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Layer up and ride deeper into winter with the Cold Days 2nd Baselayer
What Our Gearhead® Experts Are Saying:
"The Cold Days 2nd Baselayer slotted right between my Flanders base layer and my winter jacket and made a noticeable difference on a ride that dipped below twenty degrees. The Polartec Alpha fabric added real warmth without the clammy feeling I usually get from heavier base layers, and the off-center half zip kept bulk away from my other zipper pulls."
The Cold Days 2nd Baselayer from Castelli was born out of a specific problem: needing more insulation than a base layer alone can deliver on sub-freezing rides without the bulk of a second jacket. Polartec Alpha fabric brings soft, stretchy, lightweight insulation that layers cleanly between a base layer and an outer jacket. The off-center half zip keeps everything streamlined at the chest, where zipper bulk tends to stack up most.
Details
- Insulating mid-layer built for cycling in 17-41°F conditions
- Polartec Alpha fabric adds warmth without weight or clamminess
- Off-center half zip reduces bulk where chest zippers stack up
- 176g construction layers cleanly between base layer and jacket
- Regular fit tucks into tights or wears loose over the hip
- Castelli insulation designed specifically for sub-freezing rides
- Item #CSTZ84N
- Material
- Polartec Alpha
- Insulation Weight
- heavyweight
- Fit
- slim
- Style
- half-zip mock-neck
- Claimed Weight
- 6.2oz
- Activity
- road cycling
- Manufacturer Warranty
- limited 2 year
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Frequently Asked Questions
What temperatures is the Castelli Cold Days 2nd Baselayer designed for?
Castelli lists the Cold Days 2nd Baselayer for 17–41°F (-8°C to 5°C), making it an insulating layer for cold-weather rides rather than a standalone shell.How does Polartec Alpha 90 perform on cold cycling rides?
The Polartec Alpha 90 fabric provides high-loft active insulation and moisture management for hard efforts, with recycled PET in its construction.How should I layer the Castelli Cold Days 2nd Baselayer?
Wear it between a moisture-wicking cycling base layer and a winter jacket; its heavyweight insulation adds warmth without the bulk of a second jacket.What do the half-zip mock neck and offset zipper offer under a jacket?
The half-zip mock-neck construction gives adjustable coverage, while the asymmetrical zip helps reduce bulk beneath an outer layer.What fit and weight should I expect from this men’s cycling baselayer?
The garment weighs 6.2 oz and has a streamlined cycling fit for layering. The fit reference shows a 183 cm model wearing size M.