The nano beads are 100% safe & gentle on the natural hair & are not at all bulky, they are also less than a 10th of the size of the original bead, these tiny beads hide easily in any colour hair & are 100% re-usable. The nano bead is another great, reliable safe extension method made with high quality Italian keratin. This method is a single strand application, where thick 1g itip strands will be attached with beads discreetly hidden in your hair using an individual application by your hair extension professional. A regular full head of microbead extensions involves 100 pieces (100g)