FESHFEN's invisible wire hair extensions are made with thicker and less prone to tangling synthetic fiber. They are incredibly easy to apply and can be adjusted for the perfect fit. With these transparent wire extensions, you have the freedom to change your hair style at your convenience, all without the need for tape, glue, or any damage to your scalp and natural hair. The wire extension features 2 built-in clips that securely attach it to your hair, ensuring it stays in place without slipping.