Designed specifically for comfort, support and weight redistribution in athletic, walking and comfort footwear. These tri-density orthotics feature a Copper Guard top cover and a layer of Pro-Shox® for superior cushioning and shock absorption. Copper Guard's high-tech polyester fibers wick moisture away from the foot and provide a cool, friction free surface to prevent blisters and other foot problems. L420 - Our orthotic for low arches to flat feet with no forefoot pain, featuring a posted heel to control over-pronation and provide balance. L420 - Our orthotic for low arches to flat feet with no forefoot pain, featuring a posted heel to control over-pronation and provide balance. Details: Top Cover Material: CopperGuard® antimicrobial lining Center Cushioning Material: Pro-Shox® polyurethane to absorb shock and reduce impact Performance Base: Aerocell™ polyurethane for high energy return Insole Thickness: .2165" Recommended for: Hikers, Walkers and Everyday Activities Best for: Hiking boots, Walking shoes, Everyday shoes, sneakers and boots