Simply put your cap in the washing machine on it's own at 30 degrees. It only needs a short wash, we've tested ours in washes as short as 15 mins and it's done the job! Please note: - Washing it at higher temperatures will compromise the improved buckram we use. So stick to 30 degrees. - Washing your cap with other items make it likely to break. The other items become heavy when wet and will pull the stitching away. So wash your 1Cap on it's own.