not fine hair friendly [SEP] honestly i m not sure that it does anything lol i have fine wavy hair and live in florida i feel like it does define my curls but if i go for one extra pass it makes frizz worse also the massage effect is worthlessupdate i ve had this brush for a while now but lately it s had the true test i have blunt cut bangs and the last few days every time i straighten them i have wavy hair they have static i comb them and my hair follows the comb i broke out this brush turned it on combed my bangs and static was instantly gone i m now convinced it works