• large, ribbed velvet upper dark gray-brown color • warm textile insole • flexible polyurethane foam outsole (shape memory) • indoor use AIRPLUM slippers are manufactured in France (since 1947). The company has developed a unique process for the production of expanded polyurethane foam soles, for which they have obtained an exclusive patent. Slippers have an ultra-light memory foam sole combining truly exceptional comfort, elegance and hygiene, since they can be machine-washed at 30°. Its shock-absorbing characteristics make it extremely effective in relaxing the arch of the foot, in particular after participating in sports or long working day that stress the joints in the lower part of the body (pelvis, knees, ankles etc.). They are also recommended by podiatrists for reducing joint tension in patients suffering from arthritis or delicate tendons.