Birkenstock Birko Active Outdoor Fun Insole.

• Birko Active Outdoor Fun, the breathable insole for men's and women's shoes, establishes ideal contact between the insoles of conventional footwear and the anatomical form of the foot.
• The foot in naturally supported and guided when standing, walking and running.
• The core of shock-absorbing material ensures outstanding comfort on foot - whether fitted in hiking boots or casual shoes.
• Style no. 1001284