Unused [Birkenstock] Birko Active Insoles Size: 44 (28.5cm) Shipped via Mercari delivery, Yu-Packet. Although unused, the packaging is damaged. Please be aware of this. These insoles are recommended for light sports. The forefoot uses polyurethane with excellent cushioning, and the heel uses flexible and highly durable polycarbonate, achieving impact resistance and stability. The surface material is a mesh liner that excels in moisture absorption and quick drying, providing comfort. The toe can be cut, allowing for fine adjustments to fit the shape of your shoes. #Birkenstock #Men's #Women's #Birko #Active #Insoles