I love my Sigma f80 Kabuki brush!
I have been using it to apply my liquid foundation for about a year now..
On 5/21/12, I was washing my brushes and my kabuki brush completely fell apart.
I was so disappointed, so I decided to contact sigma customer service, and guess what?
A week later, I had a brand new brush in my hand:
Such great customer service!
Thank You Sigma!!