Ken recommended these to me and they've worked wonders for my shin splints (although I use a different type of metatarsal insole that he used). I got a $25 pair from an athletic health supplies store (which seemed cheap to me). I used them on top of some other general-purpose sport insole that I was already using like the Spenco ones (with which I've also had good experience). If you have health issues because of footbag I wouldn't skimp on price -- you might regret it later.