Ultra Work Sports InsolesThese 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