Introduction to SNGG|The co-branded Birkenstock shoes are really a classic design that will never go out of style and are in line with everyone’s current pursuit of comfortable and healthy wearing concepts. They are regarded as important daily slippers by many domestic and foreign celebrities and fashionistas. Choose, - MATERIAL Material - Upper: First-layer cowhide Inner: Customized material and leather Outsole: Private mold TPU foam combination sole Size: #35~40,