Hi Seven.. I`m not sure where you read that but [ not being smart with you] there`s a difference between `thinning`and cutting..... I`d be very loathe to thin any system ...you order it with the required density, and that should be `wearable`from the off.....cutting/trimming the hair to the required length is really all that should be done / need to be done by your stylist. That`s just my 2 -cents worth .... others may have a different `take`on it...regards, Paul.