I was recently gifted about a half dozen bags of Botanicare's Slacker soil.
http://www.botanicare.com/Slackertrade-P195.aspx
According to their website, it has the following in it.
Ingredients: CocoGro® High Pith Coconut Coir, Hydrolite® (Silica Based Rock), Rice Hulls, Perlite, Compost...