What Our Gearhead(R) Experts Are Saying: "This is the jersey I want when it's brutally hot and the pace is high. It feels incredibly light, vents aggressively, and never gets soggy or unstable. It's clearly built from real heat data, not just theory."When racing in extreme heat, cooling efficiency becomes performance. The Gregarius Clima QLAB Jersey from Q36. 5 is engineered as an ultralight race jersey for high-intensity riding in the hottest conditions, translating laboratory heat mapping directly into fabric placement and construction. Three advanced fabrics are body-mapped to manage airflow and moisture where the body needs it most. Ultra-lightweight textiles across the front and back maximize breathability, while a proprietary raglan sleeve design maintains an adaptive, aerodynamic fit at speed. A power mesh pocket construction delivers secure storage without restricting airflow, keeping the jersey light, fast, and controlled when conditions are at their most demanding.