These are premium synthetic Halo units. They were discontinued due to a design flaw, were best for larger heads. I do hair so I am able to adjust the size of the wire and they are perfect. I have also added a couple clips to ensure they don’t slip. Great units just need a couple little tweaks. I have them in light, dark blonde, gold blonde, brown, med brown, black, frosted, and cherry ombre and brown ombre. Please message for any offers or questions thanks for looking!