The eco-designed anatomical ski boot insole is tailored to your foot type. Sidas has developed the 3 Feet concept, which adapts the sole construction to the 3 different arch types. The 3 Feet Eco Winter Low insole is designed specifically for feet with low arches. The EVA shell provides stability and support. The thin woven polyester mesh top layer, combined with our Evamic Insulated foam, provides thermal insulation, protecting your feet from the cold.