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Castelli Pro Issue Undershirt

Which T-shirt size is most common in your closet?
Size EU
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  • Free tracked shipping over £35.00
  • Trustpilot review 9.3 out of 46.976 reviews

Pros & Cons

  • The aerodynamic shirt fits over the wide collar of the Castelli Pro Issu
  • It is not suitable for cold conditions
Read more on what our customers have to say about this product


Brand Castelli
CollectionSummer 2019
Quantity1 piece
Season Summer
All specifications


The Castelli Pro Issue is a base layer for mild to warm weather conditions. Thanks to the wide collar this T-shirt is suitable to wear under aeroshirts or aerosuits, without sticking out.

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Type Shirt Shirt Shirt Shirt
Sex Men Men Men Men
Which T-shirt size is most common in your closet? XS / S / M / L / XL XS / S / M / L / XL / XXL S / M / L / XL / XXL S / M / L / XL / XXL
Collection Summer 2019 Summer 2019 Summer 2019 Summer 2019
Quantity 1 piece 1 piece / 3 pieces 1 piece / 2 pieces 2 pieces
Size EU S / M / L / XL / XXL XS / S / M / L / XL / XXL S / M / L / XL / XXL S / M / L / XL / XXL
£30.00 From £32.10 From £30.40 £27.00
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10 / 10

B., 11 June 2019

Lekker comfortabel

Doet wat het moet doen, voel totaal niet dat ik hem aanheb, voert goed zweet af maar houdt ook wel warm.


  • pasvorm prima

10 / 10

Tim, 16 May 2018

Onverwacht comfort

Na jaren overwegen toch maar eens een "base layer" gekocht. En warempel dat bevalt me uitstekend! Bij hitte geeft het net dat beetje extra ventilatie en koelt het af geeft het net dat beetje extra isolatie. Aanrader! Maat is wel weer lastig, heb alles eigenlijk in L van Castelli maar dit is dan weer XL.


  • Comfort
  • Goede isolatie
  • Goede ventilatie


  • Maat blijft lastig bij Castelli.
  • Prijs

10 / 10

Marco, 13 May 2018

Geweldig ondershirt

Al wat shirts gedragen van de nodige merken, maar deze is echt top. Zit heerlijk. Je voelt amper dat je het aan hebt. Maatvoering is ook prima. Shirt voert het zweet heel goed af. Ook na intensieve ritten stap ik droog van de fiets af.


  • Zit heerlijk
  • Houd je droog

10 / 10

Stefan, 20 November 2016

Tolles Material in guter Verarbeitung.

Gewohnt Castelli-typisch gutes Material. Angenehm zu tragen und gut verarbeitet. Preis-Leistung stimmt.

All specifications

Manufacturer description

This is the piece our pros requested for those in- between conditions where the Flanders is too warm and the Core Mesh is too cool, like Spain in February or Belgium in April. You’re not looking for warmth from your base layer, just something to move the moisture away from your body and help your race jersey perform. Our 3D mesh fabric creates dead air space next to your skin, while the polyester capillary action moves sweat away.

Additional information

• Weight: 44 grams (maat L)
• Suitable for temperatures between 15° and 25°

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