NWT 16" Hidden Crown® Seamless Clip In - ash blonde with auburn lowlights - color #612 - Remy Human Hair - Color #612: Ash blonde with auburn lowlights - 140g: 1 pack, 5 pieces. Varying widths. + Seamless extensions are held together by a silicone adhesive that binds the hair and the clip. They are 50% thinner at the top of each extension, allowing them to lay flatter on your head for a more natural look. + REMY Hair is considered the finest quality + Reviews give 4.8 stars For best results, wash with sulfate-free shampoo and use low heat.