How do you waterproof clothes?

To waterproof clothes, you can apply a water-repellent spray specifically designed for fabrics, ensuring to cover the entire surface evenly. It's important to clean the clothing first to remove any dirt or oils that might hinder the treatment. Additionally, some garments can be treated with a wash-in waterproofing agent during laundering. Regularly reapplying these treatments will help maintain the waterproofing over time.