Castelli Flanders 2 Long Sleeve Undershirt – Maximum Winter Insulation

When the temperature drops towards freezing, the Castelli Flanders 2 Undershirt becomes your most valuable asset. As the warmest base layer in the Castelli range, it is specifically engineered to provide total thermal insulation for the most dedicated winter cyclists.

SottoZero Fleece Technology

Constructed from 100% polyester SottoZero Fleece, this base layer utilises a multi-density fabric with a soft thermal lining. The mid-height neck provides extra coverage against the cold, while the mesh underarms offer localised ventilation to ensure your sweat is managed effectively even during intense efforts.

Technical Specifications:

• Fabric: SottoZero thermal fleece for ultimate warmth.
• Breathability: High, featuring strategic mesh zones.
• Seams: Merrow flat-seam construction for a chafe-free experience.
• Structure: Anatomical design tailored for the cycling position.