The top mountain bike jersey for riding in hot conditions.

The ultimate in cooling performance, the Defend Delta Long Sleeve Jersey is specifically engineered to ensure you're the coolest shredder on the mountain. The Polartec Delta fabric does three things and does them very wellincreases airflow, reduces friction, and dissipates heat, which is exactly what you need when you're banging out hot laps on hot days. Cordura knit sleeves add some hard-wearing elements, providing extra abrasion resistance without losing any comfort.