Unused [Birkenstock] Bilko Active Insoles / Inner Soles Size: 36 (23cm) 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 polycarbonate, which is flexible and highly durable, achieving impact resistance and stability. The surface material is a mesh liner that excels in quick-drying and comfort. The toes can be cut, allowing for fine adjustments to fit the shape of your shoes. #Birkenstock #Men's #Women's #Bilko #Active #Insoles #InnerSoles