- Size: 38 • High-quality insoles that act as a thermal insulator between the foot and the sole. • Keep feet warm even on the coldest autumn and winter days. • Suitable for activities like skiing and skating. • Non-slip felt bottom layer for a firm grip in any footwear. • Improve walking comfort. • Ideal for sports, work, and casual shoes. • Lightweight, soft, durable, thick, and cushioned. • Can be cut to fit all sizes, both for children and adults.