Tulip slippers by ILSE JACOBSEN. The upper is made of recycled microfiber and attached to our iconic Tulip sole, which is made of 75% natural rubber and 25% recycled rubber, with match-colored recycled thread, using no glue. The slippers are lined with soft faux fur made of 100% polyester. The insole, lined with pig suede, has padding and support, ensuring great comfort.