Properties: The playful BIRKENSTOCK Kumba sandals feature crisscross straps and a heel strap that guarantee comfort and stability for your feet. It's a perfect choice for warm summer days. This time, the sandals appear in a completely new version: in an extravagant, electrifying metallic design. The light-reflecting foil gives our classic a new shine and makes the shoes a perfect complement to any outfit. The upper material is made of skin-friendly, durable synthetic material Birko-Flor®. Anatomical insole made of a blend of cork and latex Upper material: Birko-Flor® Lining: suede leather Sole: EVA foam Specifications: three straps, each with an adjustable metal buckle; heel strap Made in Germany Upper: Birko-Flor®. Birko-Flor® is made of easy-care and hygienic PVC, lined with a soft, breathable fleece layer on the inside. This high-quality, comfortable, and durable material is very gentle on the skin. Insole: Suede. A flexible, skin-friendly leather lining hugs your feet and conforms to their shape. The open, porous, and therefore breathable surface ensures a comfortable foot climate, even during the most strenuous physical activity. Insole Material: Cork. Cork is an eco-friendly material obtained from the bark of the cork oak tree. This natural product has insulating properties and provides excellent cushioning. Outsole: EVA. EVA (ethylene vinyl acetate) is a high-quality, ultra-light, flexible material that provides excellent cushioning. This smooths out minor surface irregularities and provides a gentle cushioning effect with every step.