Footbed with insole made of soft natural leather The unique MEPHISTO footbed with its built-in climate system adapts itself perfectly to the shape of your foot like a soft sandy beach. SOFT-AIR technology Unmatched walking comfort thanks to our unique SOFT-AIR technology. 100% natural cork Premium natural cork from our own cork footbed production facility in Portugal. Free of additives and very durable. Jute layer Protects the cork layer and keeps it supple and flexible. Ultralight rubber sole Our Rubber Lite sole is ultralight and is extremely comfortable to wear.