Insole 3 Layer Salamander Astro Therm - insole for cold autumn and winter days / 100% wool / The multilayer structure of the sock provides multilateralism. The top layer of 100% wool, warm feet and makes you feel comfortable. The intermediate layer of soft foam, which reduces the load. Aluminum foil with non-slip sleeve protects from cold and damp. «Astro Therm» is added to the boots with the wool upwards.