A polyester jacket can be water-repellent, but like nylon jackets, it depends on the specific jacket and its treatment.
Polyester itself is not inherently water-repellent, but many polyester jackets are treated with a Durable Water Repellent (DWR) coating.
This coating creates a water-resistant barrier on the fabric's surface, causing water to bead up and roll off instead of soaking in.
However, the effectiveness of the water repellency may vary depending on the quality of the DWR treatment and how well it has been maintained.
Regular wear and exposure to the elements can wear off the DWR coating over time, reducing its water-repellent properties.
Therefore, while polyester jackets can be water-repellent, it's essential to check the jacket's specifications and consider reapplying DWR treatment as needed for optimal performance.