If I use an elastic, there will be casualties. When I detangle, there will casualties. Hair barrettes etc. Casualties. When I forget and leave the window down in the car, casualties. Roll my hair up in the car window, get it caught in the door. I use to wear it layered and I'd have it thinned about twice a year. Its been awhile since I've needed any thinning since I began to let the layers grow out. I know I kill a lot of hair so I'm darn curious as to how long it can get in spite of all that.