Birkenstock Heeled Arch Support Footbeds Unisex Insoles BlueThe Birkenstock Blue Heeled Footbed is an orthotic 3 4 length replacement insole that works just as well in any brand of footwear. These Birkenstock Blue Heeled Arch Support Unisex Insoles have the following features: Synthetic, Fabric and Cork Lightweight, high sides, deep heel cup and contoured arches balance foot pressure and reduce fatigue Silk liner absorbs moisture while the cork EVA underside provides shock absorption Recommended for shoes and