L400 - Our neutral orthotic option, great for an average arch type or if you are unsure which customized orthotic to try, featuring a cupped heel to cushion and stabilize the back of foot. 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