How to Wash a Polo Hat
- 1). Place the hat in a washable hat mold, if desired. Shaped like the hat, the mold snaps around it to keep the hat in the correct form during the wash cycle.
- 2). Launder the hat alone on the gentle cycle, using about a tablespoon of gentle laundry detergent. Use a color-safe detergent if your hat is a vibrant color or you're worried about colors running. Set the cycle for warm water, not hot.
- 3). Set the hat out to air dry; never put it in the dryer.
- 4). Keep the hat in the mold as it dries. If not using a mold, set the hat out to dry shaped in its form. Use crumbled balls of newspaper stuffed inside the cap to help the hat dry in its regular shape.
Source...