Specialized Prime-Series Alpha jacket review

Specialized’s Prime-Series Alpha jacket uses Polartec's Alpha Direct insulation for this winter warming mid-layer

Specialized Prime-Series Alpha Jacket
(Image: © Ruby Boyce)

Cyclingnews Verdict

Using Polartec’s Alpha Direct material for insulation, Specialized has created an excellent mid-layer jacket for cold weather protection


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    Comfortable semi-road fit

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    Extremely warm

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    Very lightweight

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    Two-way zip


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    No rear pockets

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Specialized’s Prime-Series is a winter collection featuring this Alpha jacket, a thermal insulated long sleeve jersey and accessories like waterproof and thermal winter gloves that all use Polartec materials for insulation. 

The Specialized Prime-Series Alpha jacket arrived through my door just before starting the Rapha Festive 500 and the terrible conditions this year couldn’t have been a more apt testing environment for this Polartec insulated mid-layer jacket.

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Graham has been part of the Cyclingnews team since January 2020. He has mountain biking at his core and can mostly be found bikepacking around Scotland or exploring the steep trails around the Tweed Valley. Not afraid of a challenge, Graham has gained a reputation for riding fixed gear bikes both too far and often in inappropriate places.