In the past Ive used my hair from all parts of my body, my wife's hair when she's sleeping (she now wears a wig) Ive taken my kid's hair and both dog's hair they are basically hairless now and run from me when I come in the room with a scissors...Im a new uncle ...maybe at the baby naming Ill get me some more hair to test!!!and every nite I am searching ebay for hair to purchase for this test...fishing line? lets try dental floss or some other material...and lets not forget how taunt to you hold the hair? from what angle to you cut it ? across? sideways ? flat? this so called test is silly and a waste of time...I stopped using it when first learning to hone my razors passed the hht and shaved like crap...an old barber friend at trumpers in london said spend the time cutting hair on learning better honeing techniques...the hht ranks up there with the newbie who posted the thread about how he was mixing preshave oil and shavecreme together to get a great lather and some guys on this forum chimed in that it sounded like a great idea!