What Our Gearhead(R) Experts Are Saying: "The Concept Radiator Jersey is my go-to when the heat is brutal but I still need top-end performance. The Polartec Delta fabric seriously cools as I ride, and the new race fit feels like a second skin-perfect for high-output days. Plus, those stability pockets stay locked down even when fully loaded."When summer rides demand maximum cooling and no-compromise speed, we trust the Velocio Concept Radiator Jersey. Designed with recycled Polartec Delta mesh across the front torso and sleeves, this jersey actively cools as we sweat, mimicking a radiator to lower our body temperature while maintaining an aerodynamic race fit that feels like a second skin. The lightweight construction features bonded hems for a clean, low-profile look, a super low collar to boost airflow, and a lightweight YKK CamLock zipper with a full-length garage for frictionless comfort. Stability pockets stay perfectly positioned even when packed full, keeping ride essentials secure without disrupting the jersey's streamlined performance. Built for the hottest race days, the Concept Radiator Jersey is the lightweight edge we rely on when conditions are at their toughest.