Dirt, oils, and grime gradually rob your jacket of breathability and water repellency. In Trekitt’s guide, we break down why washing matters, how to do it properly (including detergent choices, washing machine settings, and drying methods), and how to restore the durable water repellent (DWR) coating so your jacket performs like new. Follow our step-by-step procedure and practical tips to extend the life of your shell, keep it working great, and reduce unnecessary replacements.