These closed cell high-profile footbeds offer a lighter-weight alternative to solid viscoelastics. They are more contoured and offer more heel stabilization and extra arch support. The Ultra Performer is made with Viscolas^®inserts to dampen shock in the areas where heel strike causes the most underfoot pressure. Do yourself a favor--replace the ordinary insoles in your sports shoes with Ultra Performers! You won't believe the difference these cushions make!