In this hair extension technique, we use strands placed on silicone tapes. Their application involves joining two such strands with natural hair placed between them by gluing them both from above and below. This creates durable and, importantly, invisible connections, making the hair longer and thicker. The resulting effect resembles a sandwich in its structure, hence the name of this method.
Tapes usually have a width of 3-4 cm. The number of strands to be used depends primarily on the structure of our natural hair and the effect we want to achieve. To thicken the hair, even 10 strands may be enough. If we want to achieve a lengthening effect as well, we need more strands - about 30-40.