I bought these pom-pom booties to wear while I work out on my eliptical machine and I needed the pom-poms to keep the socks from travelling down into my tennies.  The first time I washed them, FIVE of the sock lost the pom-poms, which appear to be glued on instead of sewn on.  I expect in one more washing, I'll lose the rest and they will be useless to me.