The conditions heel spur and plantar fasciitis are often confused, but Tuli understands the difference. Tuli?s Polar Bear Dual Density Heel Cups were developed for the true heel sufferer. With just one look one can see the strategically placed blue shock absorbing waffles inside a ring of soft, comfort providing TuliGel. The ring acts as a cradle, babying your heel, while it distributes pressure to the outer edges of you heel - away from the injured area.