With the cooling technology of Polartec Delta fabric, the Defend Delta Jersey is like having a built-in radiator, regulating your body temp as you transition between lung-busting climbs and high-speed descents. The material offers quick dry times and better breathability when wet, making this jersey suitable for a wide range of conditions. And with brasion-resistant Cordura sleeves, you won't need to worry about overgrown trails or low-hanging branches snagging you as you ride past.