The Sidas Winter 3D Merino Insoles are pre-shaped insoles for skiing, snowboarding and other cold-weather mountain activities, recommended especially for skiers who suffer from cold feet. They combine anatomical 3D support with merino wool and an aluminium film for warmth and comfort inside ski boots.

• Merino wool top layer: provides a warm, soft feel and natural odour control.
• 3D EVA shell: supports and stabilises the foot along its whole length.
• EVA cushioning: a layer of EVA foam across the insole plus an additional EVA heel pad.
• Aluminium film: the bottom layer limits heat loss into the ski boot.
• For winter sports: suited to skiing and snowboarding, especially for those prone to cold feet.
• Cut to size: before use, the insole is trimmed to the shape of the boot's original insole.
• Sizes: XS, S, M, L, XL.