Castelli Climbers 4.0 Short Sleeve Jersey Sulphur/Twilight Blue RGroup_19AD2E62F49FB583F0CC65472A52FB0180A6C3EC Each kit includes one K-Edge

Each kit includes one K-Edge co-polymer insert and two pre-applied screws for easy installation

crafted from medium carbon steel and high-quality polymer for durability and a distinctive design

and functionality for cold-weather cycling

ensuring your hydration needs are always within easy reach

Castelli Climbers 4.0 Short Sleeve Jersey Sulphur/Twilight Blue RGroup_19AD2E62F49FB583F0CC65472A52FB0180A6C3EC Each kit includes one K-EdgeThe Castelli Climbers 4. 0 Short Sleeve Jersey is expertly designed for the hottest days when aerodynamics still matter. Utilizing CFD based fabric placement and seam construction, this jersey ensures rapid cooling, lightweight performance, and optimal aero efficiency. The airflow shoulder construction and Flusso 3D fabric on the front provide exceptional breathability, while the StradaPro 3D back enhances ventilation. Elbow length stretch sleeves