Hardshell rain jackets don't stay water resistant forever. This is how to give new life to your old outdoors outerwear.
https://www.wired.com/story/how-to-waterproof-rain-jacket/?utm_source=dlvr.it&utm_medium=blogger
https://www.wired.com/story/how-to-waterproof-rain-jacket/?utm_source=dlvr.it&utm_medium=blogger