BirkoActive “Outdoor Fun”, the breathable integral insole for men's and women's shoes, combines the inner soles of traditional shoes with the anatomical shape of the foot. As you walk or run, your foot is guided and supported. The cushioning core of the material guarantees maximum comfort, both with mountain shoes and with casual shoes. Anatomically shaped insole over the entire length of the foot with flexible and shock-absorbing front area Additional support for sports activities Breathable mesh lining For sports, professional, gymnastics, mountain and tennis shoes