I have fallen in love with these.
They are amazing!
I put one in my hair, in a high ponytail today and it didn't budge even a tiny bit ALL DAY! I know I am using a lot! of exclamation points, but it's is well merited. I am one of those people who gets excited over the shiny new hair products at the store, and this one actually does what it says. I have never had such a satisfactory experience with any ponytail holder in my life.
You must buy them.
(I get no commission from your purchase, only joy knowing your hair will stay put like mine does.)