Old Navy Boot Sale this Week? HELP PLEASE?

I saw a commercial multiple times while watching TV last night that said that boots at old navy were $15 this week. When I looked on the website, only boot SLIPPERS were listed. In the commercial I saw lots of ugg-style boots that were really cute and definitely not slippers!! Does anyone know more about this sale? Is it different in the stores (I'm hoping it is!)? THANKS FOR YOUR HELP!!!