This method started in the 90’s . The older method used a wax based compound to adhere strands of hair to individual strands. The biggest disadvantage was that the formulation was made of wax,” which caused extensions to melt while under the hair dryer.” Another disadvantage was the removal – oil and heat had to be applied to the infused strands, which caused the wax to spread throughout the ends of the mane; making removal difficult. The new and best methods use a keratin based compound. It has it’s own remover that removes very easily without any complications. This method was created for Free Flowing Hair Extensions. The cost usually runs between $600.00 – $2500.00 and usually takes about 3 – 6 hours. Technique last from 3 – 6 months.