HydroTek by Portacool Replacement Media Set for the Jetstream 270. Experience the future of cooling with HydroTek evaporative media set. It is the new standard in evaporative media technology, engineered to deliver superior airflow and maximize cooling efficiency. Crafted from premium materials, HydroTek powers your evaporative cooler with unparalleled cooling performance, keeping you cool, comfortable, and in control, even in extreme conditions.