Spenco® PolySorb® Cross Trainer replacement Insoles are proven to deliver the best combination of shock absorption and energy return* during any athletic activity. Spenco® PolySorb® Cross Trainer Style Insoles are made of closed-cell nitrogen-injected Spenco® material and is laminated over a specially contoured, lightweight polyurethane base to provide outstanding cushioning and foot stability. Awarded the Seal of Acceptance by the American Podiatric Medical Association. Unconditionally guaranteed one full year. Spenco® PolySorb® Cross Trainer Replacement Style works great for aerobic, running, weight training, and walking. Special cushioning in both the heel strike zone and the forefoot area for outstanding performance. Helps turn any athletic shoe into a cross training shoe. If you work on concrete floors you will love the Spenco® PolySorb® Cross Trainer replacement Insoles. Just take the insoles that came in your shoe and replace them with Spenco® PolySorb® Cross Trainer Insole. Spenco® PolySorb® Cross Trainer are washable and can often hold up through more then one pair of shoes. Polysorb® Cross Trainer insoles from Spenco® are not just arch supports but they are contoured with a heel cup and arch for extra comfort! They make for excellent replacement insoles for athletic shoes, work boots and even most casual shoes. Available in seven sizes fit youth, men's 6-15, women's 3-10.