Made for skiers with medium arches, the Sidas 3Feet Eco Winter Mid Insoles use an EVA shell to deliver the perfect balance of stability and support, helping optimize body alignment from the first turn to the last. The medium arch design follows the 3Feet® concept for targeted support, while the thermal insulation—featuring a polyester mesh cover and partially recycled Evamic foam—keeps feet warm without adding bulk. Easily integrating into any ski boot, they provide all-day comfort and cold-weather protection for skiers who want better fit and feel on the mountain.