This LOWA Anti-Static Insole is designed for our Task Force line of footwear. These insoles are moisture-wicking and have antistatic properties to be integrated for use in certified Z-C models. Insole: Unisex Sizing suggestions: Women's boots: please size down a full size example if you wear a women's boot size 9.0, you would purchase an insole in size 8.0 Men's boots: if you wear a men's boot size 9.0, you would purchase an in sole in the same size 9.0 Abrasion-resistant Moisture-wicking due to water permeability Integrated conductive tape promotes antistatic properties for use in certified Z-C models Material composition: 90% felt (polyester-viscose+steel blend), 10% polyamide Replacement insoles: recommended specifically for the Z-C models