I recently purchased some slightly used Sparkle Athletic Headsweats visors from Poshmark. Poshmark is an online marketplace where users can buy and sell new and used goods, mostly clothing.
I received the visors and they were as advertised, with a few sparkles missing and lightly soiled. So far, so good, but I had to clean them.
I washed them in our dishwasher using some cap washing frames. I was very concerned about losing some of the sparkle bits.
I was only slightly worried about bleeding colors so I washed them separately but with similar colored items.
Turns out, I shouldn't have been worried about the sparkles. The color, however, faded a lot -- on both hats!