Cold fusion technique without heat, also known as machine weft. This weft is much thicker than genius wefts and hand-tied wefts, making it ideal for those who want to add significant volume at the roots. This type of weft is also very commonly used for sewing clips. Weft extensions provide exceptional coverage, allowing for a lot of volume and fullness in the hair. Our packs contain 50 g of hair. The extensions are reusable and must be installed exclusively by a professional. Typically, weft extensions should be maintained every 6 to 10 weeks, depending on hair density.