Alternative Insulated Jacket

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
  

• This jacket has a narrow racing cut and runs small — order one size up.
  
• If you have broader shoulders, size up two.
  
• Designed with a shorter torso and a non-stretch front hem; the back hem is stretchy for grip on the bike.
  
• It will feel snug under the arms and across the shoulders when standing — this is normal for an aero fit.
  
• Try it in a riding position; the fit relaxes and aligns once you lean forward.
  
• Model is 177 cm / 63 kg and wears size Small.
  
• For accurate measurements, consult the brand’s size guide

  Size Guide

• Material 1: 100% recycled polyamide
  
• Material 2: 77% recycled polyamide, 23% elastane
  
• Material 3: 100% recycled polyester
  
• Machine wash cold
  
• Use gentle detergent
  
• Do not use fabric softener
  
• Dry garment inside out in shade
  
• Made in the EU

Brothers and professional cyclists, Martin and Peter Velits, founded Slovakian brand Isadore, in a desire to create timeless and sustainable cycling apparel that celebrate the adventurous spirit of the sport. Taking into account cyclists' daily routes and lifestyles, the brand's design process addresses usability and versatility, anticipating riders' needs across seasons. Relying on natural materials and minimizing carbon footprint, the label remains mindful of sustainably and safe work environments, using factories that work within OEKO-TEX® and Bluesign® standards, and ensuring a healthy planet to ride in.