Made in Germany with the highest quality standards. Superior shock absorbing qualities reduce shock to knees, hips, and back. Medical grade viscoelastic silicone with three different densities. White Zone: Softest - provides targeted pressure relief in the problem area (heel spurs, plantar fasciitis). Blue Zone: Slightly firmer - relieves the inflamed plantar fascia and tissue. Gray Zone: Firmest, yet still soft, - provides hind foot with the necessary support. Slight lift takes tension off the plantar fascia to relieve pain and the slight medial wedge redirects pressure away from the painful area. Clinically proven 95% effective for plantar fasciitis. Does not absorb odors or exude oil like some heel cushions. They are easy to clean with soap and warm water. ViscoSpots can be switched from one pair of shoes to another. They are Latex Free and Sold in pairs.