SILVADURTM odor protection on the ForceField Footbed Protectors 3 pairs per pack Perforations for breathability Soft top cover ensures feet stay dry during barefoot wear Trim to fit most sizes The ForceField 3-Pack Footbed Protectors can be used in place of your current insoles, or worn over the top. Slip the ForceFieldTM Footbed Protectors into your shoes for lasting freshness and protection from wear and tear. Made with charcoal and featuring SILVADURTM odor protection, these protectors keep footbeds fresh, even when you're going sockless.