http://www.freedomfootbags.com/blog/the ... -in-stock/
Since I know someone's going to wonder, no, it is not filled with "sand" per say, it is however filled (partly) with glass beads, which are made from sand.
I know the price seems high, but keep in mind that this is the most expensive filler used in any footbag, and the most dense. In addition sales from this bag go directly to the Jim Penske World Championships Travel Fund
EDIT: Here's a picture...

Peace.

