Made from ripstop fabric, the Nike ACG Aireez men's running jacket is lightweight and packable. This lightweight shell has a water-repellent finish to help keep you dry on the trails. Mesh side panels and a back ventilation slit add extra airflow to help you stay cool. Loose enough to wear over a base, it packs down into its own zippered pocket when you need to shed a layer. This garment is part of the ACG (All Conditions Gear) collection from Nike, which emphasizes sustainability, and whose philosophy is “Designed, tested, and made on planet Earth. For outdoor use.”