The Sof SoleŽ Gel Heel Pad™ provides superior comfort and is made with Sof GelŽ, a revolutionary, lightweight polymer. The double-layered gel converts shock into comfortable steps, while the edges provide excellent fit and feel.
I had purchased these with a pair for a pair of Lebrons and the gel pad moves around every single time i play bball in them. I've tried below the insole and above it as well - nothing works. I'm sure there are better alternatives than this.