Seamless Hair Extensions Lightweight, flat, and natural looking, this technique will last for 4-8 weeks. You can shampoo your hair while wearing the seamless (tape) hair extensions and the hair is reusable. Frequently Asked Questions Some common questions we are asked about Beaded Weft Hair Extensions What are Seamless Hair Extensions? Seamless hair extensions are also known as tape-in hair extensions. Who can Wear Them? Anyone can wear them short term. How Long do They Last? They must be removed and reinstalled every 6-8 weeks How are They Installed? They are easily installed buy sandwiching your own hair between two layers of tape in extensions. What Does it Cost? Seamless extension hair varies by quality, color and length. The installation starts at $200 for a full head.