The Waterproof Anorak from On packs in practical features to keep the weather out. Like the elasticated tie to pull the hood tight or keep it out of the way. Then there’s the hidden vents for increased airflow. And when the rain stops, the anorak packs into its own inner pocket for easy portability. This anorak is made with a three-layer membrane for complete water and windproofing. The anorak also has dynamic breathability, which means that the more you sweat, the more breathable it becomes.