Isadore Alternative Insulated Jacket, a lightweight, high-performance insulated jacket engineered for fast, high-tempo rides in cold and dry conditions. Built with Pertex® Quantum Air and Polartec® Alpha® Direct, it delivers exceptional breathability, wind protection, and insulation—without sacrificing speed. The narrow racing cut and recycled high-density fabrics create an aerodynamic silhouette that performs as good as it looks, bringing technical craftsmanship and sustainable innovation together in one piece.

Sizing tips: 

• This jacket has an intentionally narrow racing cut and fits small.
• Order one size up from your usual size.
• If you have broader shoulders, consider sizing up two full sizes for comfort.
• The jacket is shorter in the torso with a non-stretch front hem to maintain an aerodynamic profile; the back hem features a stretchy recycled silicone gripper.
• Expect it to feel snug under the arms and across the shoulders when standing upright — this is normal.
• Always test it in a riding position. Once you lean forward, the fit relaxes and aligns as designed for cycling performance.
• Keep in mind: this is an aero race fit with a narrow waistline, optimized to reduce drag and feel weightless on the bike.
  
  

Technical Highlights: 

• Optimal temperature range: –5°C to 10°C
• Pertex® Quantum Air outer fabric on front, shoulders, and upper sleeves
• Polartec® Alpha® Direct insulation for unmatched breathability and quick-dry performance
• High-density recycled fabric on back and inner sleeves prevents heat loss
• Fluorine-free water-repellent coating repels light moisture and dirt
• Three spacious back pockets + secure zippered pocket and zippered chest pocket
• Recycled YKK® Natulon® two-way zipper and recycled silicone hem gripper
• Reflective elements for low-light visibility
• Wind protection with exceptional breathability
• Made in the EU