IMPACTO® Anti-fatigue shoe inserts features expanded Sorbothane® inlays to absorb shock and help relieve more pain in the feet, knees and lower back. Molded design with cupped heel for rear foot stability. Antibacterial soft fabric cover wicks away moisture. Ergonomically designed to provide cushioned support and shock absorbing comfort. Versatile, lightweight insoles provide arch support, comfort and even more. Sorbothane® shock protection helps protect against back and knee pain and foot injuries such as plantar fasciitis. Advanced polyurethane layer cushioning, support, rebound for less pounding per step. Sorbothane offers 94.7% shock-absorption, positioned at point of impact to reduce pain, jarring, fatigue and risk of injury. Lightweight, breathable and antifungal. Long lasting support, InWork insoles will not bottom out.