The Nike HyperShield Flash Men's Running Jacket delivers durable, waterproof coverage that won't weigh you down. Waterproof Durability Nike HyperShield fabric provides a durable, waterproof layer that remains breathable to help you stay dry and comfortable. Reinforced Protection Sealed seams and a waterproof zip add extra protection from the elements. Targeted Ventilation Zip vents under the arms help increase airflow for comfortable ventilation when you need it.