Japanese permanent smoothing treatment makes your hair gloss shine straight permanently the treatment lasts forever on hair that has been treated but you39ll need a new treatment every 8 12 months to straighten any regrowth since your last session we39ve even had customers who have been able to wait over 12 months before retouching kindly book consultation before purchasing voucher or discuss about the your hair the technician has the right to refuse your hair if its not suita